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@@ -1,971 +1,970 @@
-{
- "metadata": {
- "name": "chapter5.ipynb"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "CHAPTER 5: FUNCTIONS AND POINTERS"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:144"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Defining & calling a function\n",
- "def message(): #function definition\n",
- " print \"Smile,and the world smiles with you...\\n\"\n",
- "message() #function call\n",
- "print \"Cry, and you stop the monotony!\\n\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Smile,and the world smiles with you...\n",
- "\n",
- "Cry, and you stop the monotony!\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:146"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Calling of multiple functions\n",
- "def italy():\n",
- " print \"I am in italy\\n\"\n",
- "def brazil():\n",
- " print \"I am in brazil\\n\"\n",
- "def argentina():\n",
- " print \"I am in argentina\\n\"\n",
- "print \"I am in main\\n\"\n",
- "italy(); #italy() will be called\n",
- "brazil(); #brazil() will be called\n",
- "argentina(); #argentina() will be called"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "I am in main\n",
- "\n",
- "I am in italy\n",
- "\n",
- "I am in brazil\n",
- "\n",
- "I am in argentina\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:147"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Calling of function inside another function\n",
- "def italy():\n",
- " print \"I am in italy\\n\"\n",
- " brazil(); #it will call brazil()\n",
- " print \"I am back in italy\\n\"\n",
- "def brazil():\n",
- " print \"I am in brazil\\n\"\n",
- " argentina(); #it will call argentina()\n",
- "def argentina():\n",
- " print \"I am in argentina\\n\"\n",
- "print \"I am in main\\n\"\n",
- "italy(); #italy() is called\n",
- "print \"I am finally back in main\\n\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "I am in main\n",
- "\n",
- "I am in italy\n",
- "\n",
- "I am in brazil\n",
- "\n",
- "I am in argentina\n",
- "\n",
- "I am back in italy\n",
- "\n",
- "I am finally back in main\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:148"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Calling of main from another function\n",
- "def message():\n",
- " print \"Can't imagine life without C\\n\"\n",
- " main() #it will call back main()\n",
- "def main():\n",
- " message()\n",
- "main()"
- ],
- "language": "python",
- "metadata": {},
- "outputs": []
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:149"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Calling a function multiple number of times\n",
- "def message():\n",
- " print \"Jewel Thief!!\\n\"\n",
- "message() #1st call\n",
- "message() #2nd call"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Jewel Thief!!\n",
- "\n",
- "Jewel Thief!!\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:149"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Function calls doesn't depend on the order of functions definition\n",
- "def message2():\n",
- " print \"But the butter was bitter\\n\"\n",
- "def message1():\n",
- " print \"Mary bought some butter\\n\"\n",
- "message1()\n",
- "message2()"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Mary bought some butter\n",
- "\n",
- "But the butter was bitter\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:151-152"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Sending and receiving values between functions\n",
- "def calsum(x,y,z): #parameterized function\n",
- " d=x+y+z\n",
- " return d\n",
- "print \"Enter any three numbers\"\n",
- "a=eval(raw_input())\n",
- "b=eval(raw_input())\n",
- "c=eval(raw_input())\n",
- "sum=calsum(a,b,c) #passing values as arguments\n",
- "print \"Sum=%d\\n\" % (sum)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter any three numbers\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "10\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "20\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "30\n"
- ]
- },
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Sum=60\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:153"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#A function can have multiple return statements\n",
- "def fun():\n",
- " print \"Enter any number\"\n",
- " n=eval(raw_input())\n",
- " if (n>=10 and n<=90):\n",
- " return n\n",
- " else:\n",
- " return n+32\n",
- "fun()"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter any number\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "100\n"
- ]
- },
- {
- "metadata": {},
- "output_type": "pyout",
- "prompt_number": 7,
- "text": [
- "132"
- ]
- }
- ],
- "prompt_number": 7
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:154"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Changing formal argument in function doesn't affect the actual argument\n",
- "def fun(b):\n",
- " b=60\n",
- " print \"%d\\n\" % (b) #prints 60\n",
- "a=30\n",
- "fun(a) #prints 30\n",
- "print \"%d\\n\" % (a)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "60\n",
- "\n",
- "30\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:155"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Program explaining scope of a variable\n",
- "def display(j):\n",
- " k=35\n",
- " print \"%d\\n\" % (j) #we can't print i directly here because scope of variable is local by default\n",
- " print \"%d\\n\" % (k)\n",
- "i=20\n",
- "display(i)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "20\n",
- "\n",
- "35\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:158-159"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Square of a floating point number using a function\n",
- "def square(x):\n",
- " y=x*x\n",
- " return y\n",
- "print \"Enter any number\"\n",
- "a=eval(raw_input())\n",
- "b=square(a)\n",
- "print \"Square of %f is %f\\n\" % (a,b)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter any number\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "2.5\n"
- ]
- },
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Square of 2.500000 is 6.250000\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 10
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:161"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Printing address location of a variable\n",
- "#Note:There is no concept of pointer in python thats why i am only writing it to get the similar output\n",
- "i=3\n",
- "print \"Address of i=%u\\n\" % (id(i)) #id() will return the loaction of a variable\n",
- "print \"Value of i=%d\\n\" % (i)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Address of i=20688560\n",
- "\n",
- "Value of i=3\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 12
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:161"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Program to print address & value\n",
- "i=3\n",
- "print \"Address of i=%u\\n\" % (id(i))\n",
- "print \"Value of i=%d\\n\" % (i)\n",
- "print \"Value of i=%d\\n\" % (i)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Address of i=20688560\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 13
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:162"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Assigning address to other variable and printing them\n",
- "i=3\n",
- "j=id(i)\n",
- "print \"Address of i=%u\\n\" % (id(i)) #print address of i\n",
- "print \"Address of i=%u\\n\" % (j) #print address of i\n",
- "print \"Address of j=%u\\n\" % (id(j)) #print address of j\n",
- "print \"Value of j=%u\\n\" % (j) #print value of j\n",
- "print \"Value of i=%d\\n\" % (i)\n",
- "print \"Value of i=%d\\n\" % (i)\n",
- "print \"Value of i=%d\\n\" % (i)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Address of i=20688560\n",
- "\n",
- "Address of i=20688560\n",
- "\n",
- "Address of j=88986780\n",
- "\n",
- "Value of j=20688560\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 14
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:164"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Variable containg address of another variable\n",
- "i=3\n",
- "j=id(i)\n",
- "k=id(j)\n",
- "print \"Address of i=%u\\n\" % (id(i)) #print address of i\n",
- "print \"Address of i=%u\\n\" % (j) #print address of i\n",
- "print \"Address of i=%u\\n\" % (j) #print address of i\n",
- "print \"Address of j=%u\\n\" % (id(j)) #print address of i\n",
- "print \"Address of j=%u\\n\" % (k) #print address of j\n",
- "print \"Address of k=%u\\n\" % (id(k)) #print address of k\n",
- "print \"Value of j=%u\\n\" % (j) #print value of j\n",
- "print \"Value of k=%u\\n\" % (k) #print value of k\n",
- "print \"Value of i=%u\\n\" % (i) #print value of i\n",
- "print \"Value of i=%u\\n\" % (i)\n",
- "print \"Value of i=%u\\n\" % (i)\n",
- "print \"Value of i=%u\\n\" % (i)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Address of i=20688560\n",
- "\n",
- "Address of i=20688560\n",
- "\n",
- "Address of i=20688560\n",
- "\n",
- "Address of j=88986672\n",
- "\n",
- "Address of j=88986672\n",
- "\n",
- "Address of k=88986708\n",
- "\n",
- "Value of j=20688560\n",
- "\n",
- "Value of k=88986672\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n",
- "Value of i=3\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 15
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:166"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Swapping of two variables\n",
- "def swapv(x,y):\n",
- " x,y=y,x\n",
- " print \"x=%d y=%d\\n\" % (x,y)\n",
- "a=10\n",
- "b=20\n",
- "swapv(a,b)\n",
- "print \"a=%d b=%d\\n\" % (a,b)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "x=20 y=10\n",
- "\n",
- "a=10 b=20\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE-167"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#program to swap 2 variables\n",
- "#Note:There is no concept of pointer in python that's why i used global variables to get the same output\n",
- "def swapr():\n",
- " global a,b #global declaration\n",
- " a,b=b,a\n",
- "a=10\n",
- "b=20\n",
- "swapr()\n",
- "print \"a=%d b=%d\\n\" % (a,b)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "a=20 b=10\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 1
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:167-168"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Program to print area & perimeter of circle\n",
- "def areaperi(r,a,p):\n",
- " a=3.14*r*r #formula of area\n",
- " p=2*3.14*r #formula of perimeter\n",
- " print \"Area=%f\\n\" % (a)\n",
- " print \"Perimeter=%f\\n\" % (p)\n",
- "area=0\n",
- "perimeter=0\n",
- "print \"Enter radius of a circle\"\n",
- "radius=eval(raw_input())\n",
- "areaperi(radius,area,perimeter)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter radius of a circle\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "5\n"
- ]
- },
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Area=78.500000\n",
- "\n",
- "Perimeter=31.400000\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 22
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:169"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Finding factorial of a number without recursion\n",
- "def factorial(x):\n",
- " f=1\n",
- " for i in range(x,1,-1):\n",
- " f=f*i\n",
- " return f\n",
- "print \"Enter any number\"\n",
- "a=eval(raw_input())\n",
- "fact=factorial(a)\n",
- "print \"Factorial value=%d\\n\" % (fact)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter any number\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "3\n"
- ]
- },
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Factorial value=6\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 23
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:170"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Finding factorial of a number with recursion\n",
- "def rec(x):\n",
- " if x==1:\n",
- " return 1\n",
- " else:\n",
- " f=x*rec(x-1) \n",
- " return f #will call back the rec() function\n",
- "print \"Enter any number\"\n",
- "a=eval(raw_input())\n",
- "fact=rec(a)\n",
- "print \"Factorial value=%d\\n\" % (fact)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Enter any number\n"
- ]
- },
- {
- "name": "stdout",
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "5\n"
- ]
- },
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Factorial value=120\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 24
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:173"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#Sum of two variables using function\n",
- "def add(i,j):\n",
- " sum=i+j\n",
- " return sum\n",
- "a=5\n",
- "b=2\n",
- "c=add(a,b) #Transfers control to add()\n",
- "print \"sum=%d\\n\" % (c)"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "sum=7\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 25
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "EXAMPLE ON PAGE:175-176"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "def factorial(num):\n",
- " f=1\n",
- " for i in range(1,num+1,1):\n",
- " f=f*i;\n",
- " return f\n",
- "f=factorial(5)\n",
- "print \"%d\\n\" % f"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "120\n",
- "\n"
- ]
- }
- ],
- "prompt_number": 3
- }
- ],
- "metadata": {}
- }
- ]
+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:2cf0a369761f6b9850c2adad43b1edd33ca8cbea4df08e2e06de2898a570851d"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "CHAPTER 5: FUNCTIONS AND POINTERS"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:144"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def message(): #function definition\n",
+ " print \"Smile,and the world smiles with you...\\n\"\n",
+ "message() #function call\n",
+ "print \"Cry, and you stop the monotony!\\n\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Smile,and the world smiles with you...\n",
+ "\n",
+ "Cry, and you stop the monotony!\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:146"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def italy():\n",
+ " print \"I am in italy\\n\"\n",
+ "def brazil():\n",
+ " print \"I am in brazil\\n\"\n",
+ "def argentina():\n",
+ " print \"I am in argentina\\n\"\n",
+ "print \"I am in main\\n\"\n",
+ "italy(); #italy() will be called\n",
+ "brazil(); #brazil() will be called\n",
+ "argentina(); #argentina() will be called"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "I am in main\n",
+ "\n",
+ "I am in italy\n",
+ "\n",
+ "I am in brazil\n",
+ "\n",
+ "I am in argentina\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:147"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def italy():\n",
+ " print \"I am in italy\\n\"\n",
+ " brazil(); #it will call brazil()\n",
+ " print \"I am back in italy\\n\"\n",
+ "def brazil():\n",
+ " print \"I am in brazil\\n\"\n",
+ " argentina(); #it will call argentina()\n",
+ "def argentina():\n",
+ " print \"I am in argentina\\n\"\n",
+ "print \"I am in main\\n\"\n",
+ "italy(); #italy() is called\n",
+ "print \"I am finally back in main\\n\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "I am in main\n",
+ "\n",
+ "I am in italy\n",
+ "\n",
+ "I am in brazil\n",
+ "\n",
+ "I am in argentina\n",
+ "\n",
+ "I am back in italy\n",
+ "\n",
+ "I am finally back in main\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:148"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def message():\n",
+ " print \"Can't imagine life without C\\n\"\n",
+ " main() #it will call back main()\n",
+ "def main():\n",
+ " message()\n",
+ "main()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:149"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def message():\n",
+ " print \"Jewel Thief!!\\n\"\n",
+ "message() #1st call\n",
+ "message() #2nd call"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Jewel Thief!!\n",
+ "\n",
+ "Jewel Thief!!\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:149"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def message2():\n",
+ " print \"But the butter was bitter\\n\"\n",
+ "def message1():\n",
+ " print \"Mary bought some butter\\n\"\n",
+ "message1()\n",
+ "message2()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Mary bought some butter\n",
+ "\n",
+ "But the butter was bitter\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:151-152"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def calsum(x,y,z): #parameterized function\n",
+ " d=x+y+z\n",
+ " return d\n",
+ "print \"Enter any three numbers\"\n",
+ "a=eval(raw_input())\n",
+ "b=eval(raw_input())\n",
+ "c=eval(raw_input())\n",
+ "sum=calsum(a,b,c) #passing values as arguments\n",
+ "print \"Sum=%d\\n\" % (sum)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter any three numbers\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "10\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "20\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "30\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Sum=60\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:153"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def fun():\n",
+ " print \"Enter any number\"\n",
+ " n=eval(raw_input())\n",
+ " if (n>=10 and n<=90):\n",
+ " return n\n",
+ " else:\n",
+ " return n+32\n",
+ "fun()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter any number\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "100\n"
+ ]
+ },
+ {
+ "metadata": {},
+ "output_type": "pyout",
+ "prompt_number": 7,
+ "text": [
+ "132"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:154"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def fun(b):\n",
+ " b=60\n",
+ " print \"%d\\n\" % (b) #prints 60\n",
+ "a=30\n",
+ "fun(a) #prints 30\n",
+ "print \"%d\\n\" % (a)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "60\n",
+ "\n",
+ "30\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:155"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def display(j):\n",
+ " k=35\n",
+ " print \"%d\\n\" % (j) #we can't print i directly here because scope of variable is local by default\n",
+ " print \"%d\\n\" % (k)\n",
+ "i=20\n",
+ "display(i)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "20\n",
+ "\n",
+ "35\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:158-159"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def square(x):\n",
+ " y=x*x\n",
+ " return y\n",
+ "print \"Enter any number\"\n",
+ "a=eval(raw_input())\n",
+ "b=square(a)\n",
+ "print \"Square of %f is %f\\n\" % (a,b)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter any number\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "2.5\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Square of 2.500000 is 6.250000\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:161"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "i=3\n",
+ "print \"Address of i=%u\\n\" % (id(i)) #id() will return the loaction of a variable\n",
+ "print \"Value of i=%d\\n\" % (i)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Address of i=20688560\n",
+ "\n",
+ "Value of i=3\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 12
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:161"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "i=3\n",
+ "print \"Address of i=%u\\n\" % (id(i))\n",
+ "print \"Value of i=%d\\n\" % (i)\n",
+ "print \"Value of i=%d\\n\" % (i)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Address of i=20688560\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:162"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "i=3\n",
+ "j=id(i)\n",
+ "print \"Address of i=%u\\n\" % (id(i)) #print address of i\n",
+ "print \"Address of i=%u\\n\" % (j) #print address of i\n",
+ "print \"Address of j=%u\\n\" % (id(j)) #print address of j\n",
+ "print \"Value of j=%u\\n\" % (j) #print value of j\n",
+ "print \"Value of i=%d\\n\" % (i)\n",
+ "print \"Value of i=%d\\n\" % (i)\n",
+ "print \"Value of i=%d\\n\" % (i)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Address of i=20688560\n",
+ "\n",
+ "Address of i=20688560\n",
+ "\n",
+ "Address of j=88986780\n",
+ "\n",
+ "Value of j=20688560\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 14
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:164"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "i=3\n",
+ "j=id(i)\n",
+ "k=id(j)\n",
+ "print \"Address of i=%u\\n\" % (id(i)) #print address of i\n",
+ "print \"Address of i=%u\\n\" % (j) #print address of i\n",
+ "print \"Address of i=%u\\n\" % (j) #print address of i\n",
+ "print \"Address of j=%u\\n\" % (id(j)) #print address of i\n",
+ "print \"Address of j=%u\\n\" % (k) #print address of j\n",
+ "print \"Address of k=%u\\n\" % (id(k)) #print address of k\n",
+ "print \"Value of j=%u\\n\" % (j) #print value of j\n",
+ "print \"Value of k=%u\\n\" % (k) #print value of k\n",
+ "print \"Value of i=%u\\n\" % (i) #print value of i\n",
+ "print \"Value of i=%u\\n\" % (i)\n",
+ "print \"Value of i=%u\\n\" % (i)\n",
+ "print \"Value of i=%u\\n\" % (i)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Address of i=20688560\n",
+ "\n",
+ "Address of i=20688560\n",
+ "\n",
+ "Address of i=20688560\n",
+ "\n",
+ "Address of j=88986672\n",
+ "\n",
+ "Address of j=88986672\n",
+ "\n",
+ "Address of k=88986708\n",
+ "\n",
+ "Value of j=20688560\n",
+ "\n",
+ "Value of k=88986672\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n",
+ "Value of i=3\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 15
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:166"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def swapv(x,y):\n",
+ " x,y=y,x\n",
+ " print \"x=%d y=%d\\n\" % (x,y)\n",
+ "a=10\n",
+ "b=20\n",
+ "swapv(a,b)\n",
+ "print \"a=%d b=%d\\n\" % (a,b)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "x=20 y=10\n",
+ "\n",
+ "a=10 b=20\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE-167"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def swapr():\n",
+ " global a,b #global declaration\n",
+ " a,b=b,a\n",
+ "a=10\n",
+ "b=20\n",
+ "swapr()\n",
+ "print \"a=%d b=%d\\n\" % (a,b)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "a=20 b=10\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:167-168"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def areaperi(r,a,p):\n",
+ " a=3.14*r*r #formula of area\n",
+ " p=2*3.14*r #formula of perimeter\n",
+ " print \"Area=%f\\n\" % (a)\n",
+ " print \"Perimeter=%f\\n\" % (p)\n",
+ "area=0\n",
+ "perimeter=0\n",
+ "print \"Enter radius of a circle\"\n",
+ "radius=eval(raw_input())\n",
+ "areaperi(radius,area,perimeter)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter radius of a circle\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "5\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Area=78.500000\n",
+ "\n",
+ "Perimeter=31.400000\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 22
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:169"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def factorial(x):\n",
+ " f=1\n",
+ " for i in range(x,1,-1):\n",
+ " f=f*i\n",
+ " return f\n",
+ "print \"Enter any number\"\n",
+ "a=eval(raw_input())\n",
+ "fact=factorial(a)\n",
+ "print \"Factorial value=%d\\n\" % (fact)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter any number\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "3\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Factorial value=6\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 23
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:170"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def rec(x):\n",
+ " if x==1:\n",
+ " return 1\n",
+ " else:\n",
+ " f=x*rec(x-1) \n",
+ " return f #will call back the rec() function\n",
+ "print \"Enter any number\"\n",
+ "a=eval(raw_input())\n",
+ "fact=rec(a)\n",
+ "print \"Factorial value=%d\\n\" % (fact)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter any number\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "5\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Factorial value=120\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:173"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ " \n",
+ "def add(i,j):\n",
+ " sum=i+j\n",
+ " return sum\n",
+ "a=5\n",
+ "b=2\n",
+ "c=add(a,b) #Transfers control to add()\n",
+ "print \"sum=%d\\n\" % (c)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "sum=7\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 25
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE ON PAGE:175-176"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "def factorial(num):\n",
+ " f=1\n",
+ " for i in range(1,num+1,1):\n",
+ " f=f*i;\n",
+ " return f\n",
+ "f=factorial(5)\n",
+ "print \"%d\\n\" % f"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "120\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ }
+ ],
+ "metadata": {}
+ }
+ ]
} \ No newline at end of file
generated by cgit (git 2.34.1) at 2025-04-07 13:08:22 +0000