{ "metadata": { "name": "" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Chapter 5: Functions\n" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.1, Page no:87" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "import math\n", "\n", "# tests the sqrt() function:\n", "for i in range(0,6):\n", " print \"\\t %d \\t %f\" %(i,math.sqrt(i))" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "\t 0 \t 0.000000\n", "\t 1 \t 1.000000\n", "\t 2 \t 1.414214\n", "\t 3 \t 1.732051\n", "\t 4 \t 2.000000\n", "\t 5 \t 2.236068\n" ] } ], "prompt_number": 1 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.2, Page no:88" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "import math\n", "# tests the identity sin 2x = 2 sin x cos x:\n", "x = 0\n", "while x < 2:\n", " print \"%f \\t\\t %f \\t %f\" %(x,math.sin(2*x),2*math.sin(x)*math.cos(x))\n", " x += 0.2\n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "0.000000 \t\t 0.000000 \t 0.000000\n", "0.200000 \t\t 0.389418 \t 0.389418\n", "0.400000 \t\t 0.717356 \t 0.717356\n", "0.600000 \t\t 0.932039 \t 0.932039\n", "0.800000 \t\t 0.999574 \t 0.999574\n", "1.000000 \t\t 0.909297 \t 0.909297\n", "1.200000 \t\t 0.675463 \t 0.675463\n", "1.400000 \t\t 0.334988 \t 0.334988\n", "1.600000 \t\t -0.058374 \t -0.058374\n", "1.800000 \t\t -0.442520 \t -0.442520\n", "2.000000 \t\t -0.756802 \t -0.756802\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.3, Page no:90" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def cube(x):\n", " # returns cube of x:\n", " return x*x*x\n", "\n" ], "language": "python", "metadata": {}, "outputs": [], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.4, Page no:91" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def cube(x):\n", " # returns cube of x:\n", " return x*x*x\n", "\n", "# tests the cube() function:\n", "n=1\n", "while (n != 0):\n", " n = int(raw_input())\n", " print \"\\tcube( %d ) = %d\" %(n,cube(n))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "4\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tcube( 4 ) = 64\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tcube( 2 ) = 8\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "9\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tcube( 9 ) = 729\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tcube( 0 ) = 0\n" ] } ], "prompt_number": 1 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.5, Page no:90" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def maximum(x,y):\n", " # returns larger of the two given integers:\n", " if (x < y):\n", " return y\n", " else:\n", " return x\n", "\n", "# tests the max() function:\n", "m = 1\n", "n = 1\n", "while m != 0: \n", " m = int(raw_input())\n", " n = int(raw_input())\n", " print \"\\tmax( %d , %d ) = %d\" %(m,n,maximum(m,n))\n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax( 5 , 2 ) = 5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "3\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax( 0 , 3 ) = 3\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.6, Page no:93" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def maximum(x,y):\n", " # returns larger of the two given integers:\n", " if (x < y):\n", " return y\n", " else:\n", " return x\n", "\n", "# tests the max() function:\n", "m = 1\n", "n = 1\n", "while m != 0: \n", " m = int(raw_input())\n", " n = int(raw_input())\n", " print \"\\tmax( %d , %d ) = %d\" %(m,n,maximum(m,n))\n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax( 5 , 2 ) = 5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "3\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax( 0 , 3 ) = 3\n" ] } ], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.8, Page no:94" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "\n", "# returns larger of the two given integers:\n", "\n", "m = 1\n", "n = 1\n", "while m!=0:\n", " m = int(raw_input())\n", " n = int(raw_input())\n", " print \"\\tmax(%d,%d) = %d\" %(m,n, max(m,n))\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "4\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax(5,4) = 5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "4\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "3\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax(4,3) = 4\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "8\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax(8,0) = 8\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\tmax(0,5) = 5\n" ] } ], "prompt_number": 4 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.9, Page no:95" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def fact(n):\n", " if (n < 0):\n", " return 0\n", " f = 1\n", " while (n > 1):\n", " f *= n\n", " n -= 1\n", " return f\n", "\n", "for i in range(-1,6):\n", " print fact(i),\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "0 1 1 2 6 24 120\n" ] } ], "prompt_number": 5 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.10, Page no:95" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "def fact(n):\n", " if (n < 0):\n", " return 0\n", " f = 1\n", " while (n > 1):\n", " f *= n\n", " n -= 1\n", " return f\n", "\n", "\n", "def perm(n,k):\n", " # returns P(n,k), the number of permutations of k from n:\n", " if (n < 0 or k < 0 or k > n):\n", " return 0\n", " return fact(n)/fact(n-k)\n", "\n", "for i in range(-1,8):\n", " for j in range(-1,i+2):\n", " print perm(i,j),\n", " print ''\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "0 0 \n", "0 1 0 \n", "0 1 1 0 \n", "0 1 2 2 0 \n", "0 1 3 6 6 0 \n", "0 1 4 12 24 24 0 \n", "0 1 5 20 60 120 120 0 \n", "0 1 6 30 120 360 720 720 0 \n", "0 1 7 42 210 840 2520 5040 5040 0 \n" ] } ], "prompt_number": 6 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.11, Page no:96" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def printDate(m,d,y):\n", " # prints the given date in literal form:\n", " if (m < 1 or m > 12 or d < 1 or d > 31 or y < 0):\n", " print \"Error: parameter out of range.\\n\"\n", " return\n", " if m == 1:\n", " print \"January \",\n", " elif m ==2:\n", " print \"February \",\n", " elif m==3 :\n", " print \"March \",\n", " elif m==4:\n", " print \"April \",\n", " elif m==5:\n", " print \"May \",\n", " elif m==6:\n", " print \"June \",\n", " elif m==7:\n", " print \"July \",\n", " elif m==8:\n", " print \"August \",\n", " elif m==9:\n", " print \"September \",\n", " elif m==10:\n", " print \"October \",\n", " elif m==1:\n", " print \"November \",\n", " else:\n", " print \"December \",\n", " print d , \", \", y \n", "\n", "# tests the printDate() function:\n", "month = 1\n", "while month > 0:\n", " month = int(raw_input())\n", " day = int(raw_input())\n", " year = int(raw_input())\n", " printDate(month,day,year)\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "9\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "12\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "1989\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "September 12 , 1989\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2001\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Error: parameter out of range.\n", "\n" ] } ], "prompt_number": 8 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.12, Page no:98" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "import string\n", "def ispunct(s):\n", " return all(c in string.punctuation for c in s)\n", "def printCharCategory(c):\n", " # prints the category to which the given character belongs:\n", " print \"The character [\" + c + \"] is a \",\n", " if(c.isdigit()):\n", " print \"digit.\\n\"\n", " elif (c.islower()):\n", " print \"lower-case letter.\\n\"\n", " elif (c.isupper()): \n", " print \"capital letter.\\n\"\n", " elif (c.isspace()):\n", " print \"white space character.\\n\"\n", " elif (ord(c) >= 10 and ord(c) <= 15 or ord(c) == 0):\n", " print \"control character.\\n\"\n", " elif (ispunct(c)):\n", " print \"punctuation mark.\\n\"\n", " else:\n", " print \"Error.\\n\"\n", "\n", "# prints the category to which the given character belongs;\n", "# tests the printCharCategory() function:\n", "for c in range(128):\n", " printCharCategory(chr(c))\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ " The character [\u0000] is a control character.\n", "\n", "The character [\u0001] is a Error.\n", "\n", "The character [\u0002] is a Error.\n", "\n", "The character [\u0003] is a Error.\n", "\n", "The character [\u0004] is a Error.\n", "\n", "The character [\u0005] is a Error.\n", "\n", "The character [\u0006] is a Error.\n", "\n", "The character [\u0007] is a Error.\n", "\n", "The character [\b] is a Error.\n", "\n", "The character [\t] is a white space character.\n", "\n", "The character [\n", "] is a white space character.\n", "\n", "The character [\u000b", "] is a white space character.\n", "\n", "The character [\f", "] is a white space character.\n", "\n", "The character [\r", "] is a white space character.\n", "\n", "The character [\u000e] is a control character.\n", "\n", "The character [\u000f] is a control character.\n", "\n", "The character [\u0010] is a Error.\n", "\n", "The character [\u0011] is a Error.\n", "\n", "The character [\u0012] is a Error.\n", "\n", "The character [\u0013] is a Error.\n", "\n", "The character [\u0014] is a Error.\n", "\n", "The character [\u0015] is a Error.\n", "\n", "The character [\u0016] is a Error.\n", "\n", "The character [\u0017] is a Error.\n", "\n", "The character [\u0018] is a Error.\n", "\n", "The character [\u0019] is a Error.\n", "\n", "The character [\u001a] is a Error.\n", "\n", "The character [\u001b] is a Error.\n", "\n", "The character [\u001c", "] is a Error.\n", "\n", "The character [\u001d", "] is a Error.\n", "\n", "The character [\u001e", "] is a Error.\n", "\n", "The character [\u001f] is a Error.\n", "\n", "The character [ ] is a white space character.\n", "\n", "The character [!] is a punctuation mark.\n", "\n", "The character [\"] is a punctuation mark.\n", "\n", "The character [#] is a punctuation mark.\n", "\n", "The character [$] is a punctuation mark.\n", "\n", "The character [%] is a punctuation mark.\n", "\n", "The character [&] is a punctuation mark.\n", "\n", "The character ['] is a punctuation mark.\n", "\n", "The character [(] is a punctuation mark.\n", "\n", "The character [)] is a punctuation mark.\n", "\n", "The character [*] is a punctuation mark.\n", "\n", "The character [+] is a punctuation mark.\n", "\n", "The character [,] is a punctuation mark.\n", "\n", "The character [-] is a punctuation mark.\n", "\n", "The character [.] is a punctuation mark.\n", "\n", "The character [/] is a punctuation mark.\n", "\n", "The character [0] is a digit.\n", "\n", "The character [1] is a digit.\n", "\n", "The character [2] is a digit.\n", "\n", "The character [3] is a digit.\n", "\n", "The character [4] is a digit.\n", "\n", "The character [5] is a digit.\n", "\n", "The character [6] is a digit.\n", "\n", "The character [7] is a digit.\n", "\n", "The character [8] is a digit.\n", "\n", "The character [9] is a digit.\n", "\n", "The character [:] is a punctuation mark.\n", "\n", "The character [;] is a punctuation mark.\n", "\n", "The character [<] is a punctuation mark.\n", "\n", "The character [=] is a punctuation mark.\n", "\n", "The character [>] is a punctuation mark.\n", "\n", "The character [?] is a punctuation mark.\n", "\n", "The character [@] is a punctuation mark.\n", "\n", "The character [A] is a capital letter.\n", "\n", "The character [B] is a capital letter.\n", "\n", "The character [C] is a capital letter.\n", "\n", "The character [D] is a capital letter.\n", "\n", "The character [E] is a capital letter.\n", "\n", "The character [F] is a capital letter.\n", "\n", "The character [G] is a capital letter.\n", "\n", "The character [H] is a capital letter.\n", "\n", "The character [I] is a capital letter.\n", "\n", "The character [J] is a capital letter.\n", "\n", "The character [K] is a capital letter.\n", "\n", "The character [L] is a capital letter.\n", "\n", "The character [M] is a capital letter.\n", "\n", "The character [N] is a capital letter.\n", "\n", "The character [O] is a capital letter.\n", "\n", "The character [P] is a capital letter.\n", "\n", "The character [Q] is a capital letter.\n", "\n", "The character [R] is a capital letter.\n", "\n", "The character [S] is a capital letter.\n", "\n", "The character [T] is a capital letter.\n", "\n", "The character [U] is a capital letter.\n", "\n", "The character [V] is a capital letter.\n", "\n", "The character [W] is a capital letter.\n", "\n", "The character [X] is a capital letter.\n", "\n", "The character [Y] is a capital letter.\n", "\n", "The character [Z] is a capital letter.\n", "\n", "The character [[] is a punctuation mark.\n", "\n", "The character [\\] is a punctuation mark.\n", "\n", "The character []] is a punctuation mark.\n", "\n", "The character [^] is a punctuation mark.\n", "\n", "The character [_] is a punctuation mark.\n", "\n", "The character [`] is a punctuation mark.\n", "\n", "The character [a] is a lower-case letter.\n", "\n", "The character [b] is a lower-case letter.\n", "\n", "The character [c] is a lower-case letter.\n", "\n", "The character [d] is a lower-case letter.\n", "\n", "The character [e] is a lower-case letter.\n", "\n", "The character [f] is a lower-case letter.\n", "\n", "The character [g] is a lower-case letter.\n", "\n", "The character [h] is a lower-case letter.\n", "\n", "The character [i] is a lower-case letter.\n", "\n", "The character [j] is a lower-case letter.\n", "\n", "The character [k] is a lower-case letter.\n", "\n", "The character [l] is a lower-case letter.\n", "\n", "The character [m] is a lower-case letter.\n", "\n", "The character [n] is a lower-case letter.\n", "\n", "The character [o] is a lower-case letter.\n", "\n", "The character [p] is a lower-case letter.\n", "\n", "The character [q] is a lower-case letter.\n", "\n", "The character [r] is a lower-case letter.\n", "\n", "The character [s] is a lower-case letter.\n", "\n", "The character [t] is a lower-case letter.\n", "\n", "The character [u] is a lower-case letter.\n", "\n", "The character [v] is a lower-case letter.\n", "\n", "The character [w] is a lower-case letter.\n", "\n", "The character [x] is a lower-case letter.\n", "\n", "The character [y] is a lower-case letter.\n", "\n", "The character [z] is a lower-case letter.\n", "\n", "The character [{] is a punctuation mark.\n", "\n", "The character [|] is a punctuation mark.\n", "\n", "The character [}] is a punctuation mark.\n", "\n", "The character [~] is a punctuation mark.\n", "\n", "The character [\u007f] is a Error.\n", "\n" ] } ], "prompt_number": 4 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.13, Page no:99" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "import math\n", "def isPrime(n):\n", " # returns True if n is prime, False otherwise:\n", " sqrtn = math.sqrt(n)\n", " if (n < 2):\n", " return False\n", " # 0 and 1 are not primes\n", " if (n < 4):\n", " return True\n", " # 2 and 3 are the first primes\n", " if (n%2 == 0):\n", " return False\n", " # 2 is the only even prime\n", " for d in range(3,int(sqrtn+1),2):\n", " if (n%d == 0):\n", " return False\n", " # n has a nontrivial divisor\n", " return True;\n", "\n", "for n in range(0,80):\n", " if (isPrime(n)):\n", " print n,\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79\n" ] } ], "prompt_number": 10 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.14, Page no:100" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "def isLeapYear(y):\n", " # returns true iff y is a leap year:\n", " return (y % 4 == 0 and y % 100 != 0 or y % 400 == 0)\n", "\n", "# tests the isLeapYear() function:\n", "n = 2\n", "while n > 1:\n", " n = int(raw_input())\n", " if (isLeapYear(n)):\n", " print \"%d is a leap year.\" % n\n", " else:\n", " print \"%d is not a leap year.\" %n\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2004\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "2004 is a leap year.\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2006\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "2006 is not a leap year.\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2013\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "2013 is not a leap year.\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "0\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "0 is a leap year.\n" ] } ], "prompt_number": 11 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.15, Page no: 101" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def age():\n", " # prompts the user to input his/her age, and returns that value:\n", " while (True):\n", " print \"How old are you: \"\n", " n = int(raw_input())\n", " if (n < 0):\n", " print \"\\a\\tYour age could not be negative.\"\n", " elif (n > 120):\n", " print \"\\a\\tYou could not be over 120.\"\n", " else:\n", " return n\n", " print \"\\n\\tTry again.\\n\"\n", "\n", "a = age();\n", "print \"\\nYou are %d years old.\" %a\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "How old are you: \n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "-12\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\u0007\tYour age could not be negative.\n", "\n", "\tTry again.\n", "\n", "How old are you: \n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "125\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\u0007\tYou could not be over 120.\n", "\n", "\tTry again.\n", "\n", "How old are you: \n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "24\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "\n", "You are 24 years old.\n" ] } ], "prompt_number": 14 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.16, Page no: 102" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def swap(x,y):\n", " # exchanges the values of x and y:\n", " x[0],y[0] = y[0],x[0]\n", "\n", "a = [22.2]\n", "b = [44.4]\n", "print \"a = %.2f , b = %.2f \" %(a[0],b[0])\n", "swap(a,b)\n", "print \"a = %.2f , b = %.2f \" %(a[0],b[0])\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "a = 22.20 , b = 44.40 \n", "a = 44.40 , b = 22.20 \n" ] } ], "prompt_number": 15 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.17, Page no: 104" ] }, { "cell_type": "code", "collapsed": false, "input": [ "'''\n", "Note : Python doesn't support pass value by reference. but can be done by passing list.\n", "'''\n", "\n", "def f(x,y):\n", " x[0]= 88\n", " y[0] = 99\n", "\n", "# tests the f() function:\n", "a = [22]\n", "b = [44]\n", "print \"a = %.2f , b = %.2f \" %(a[0],b[0])\n", "f(a,b)\n", "print \"a = %.2f , b = %.2f \" %(a[0],b[0])\n", "f(2*a,b)\n", "print \"a = %.2f , b = %.2f \" %(a[0],b[0])\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "a = 22.00 , b = 44.00 \n", "a = 88.00 , b = 99.00 \n", "a = 88.00 , b = 99.00 \n" ] } ], "prompt_number": 16 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.18, Page no: 105" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def computeCircle(r):\n", " # returns the area and circumference of a circle with radius r:\n", " PI = 3.141592653589793\n", " area = PI*r*r\n", " circumference = 2*PI*r\n", " return area,circumference\n", "\n", "# tests the computeCircle() function:\n", "print \"Enter radius: \"\n", "r = int(raw_input())\n", "a,c = computeCircle(r)\n", "print \"area = %.2f , circumference = %.2f\" %(a,c)" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Enter radius: \n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "area = 78.54 , circumference = 31.42\n" ] } ], "prompt_number": 17 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.19, Page no: 106" ] }, { "cell_type": "code", "collapsed": false, "input": [ "'''\n", "Note : Python passes variable by value and not by reference. So output would be differ.\n", "'''\n", "\n", "\n", "def f(x,y,z):\n", " x[0] += z[0]\n", " y[0] += z[0]\n", " print \"x = %d , y = %d , z = %d\" %(x[0],y[0],z[0])\n", "\n", "x = [22]\n", "y = [33]\n", "z = [44]\n", "\n", "print \"x = %d , y = %d , z = %d\" %(x[0],y[0],z[0])\n", "f(x,y,z)\n", "print \"x = %d , y = %d , z = %d\" %(x[0],y[0],z[0])\n", "x[0] = 2*x[0] - 3\n", "f(x,y,z)\n", "print \"x = %d , y = %d , z = %d\" %(x[0],y[0],z[0])\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "x = 22 , y = 33 , z = 44\n", "x = 66 , y = 77 , z = 44\n", "x = 66 , y = 77 , z = 44\n", "x = 173 , y = 121 , z = 44\n", "x = 173 , y = 121 , z = 44\n" ] } ], "prompt_number": 5 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.20, Page no: 107" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "def cube(x):\n", " # returns cube of x:\n", " return x*x*x\n", "\n", "# tests the cube() function:\n", "print cube(4)\n", "x = int(raw_input())\n", "y = cube(2*x-3)\n", "print y\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "64\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "5\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "343\n" ] } ], "prompt_number": 19 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.21, Page no: 108" ] }, { "cell_type": "code", "collapsed": false, "input": [ "'''\n", "Python has it's own scope so output would be differ.\n", "'''\n", "x = 11\n", "\n", "def f():\n", " x = 44\n", " print \"In f(): x = %d\" % x \n", "\n", "def g():\n", " print \"In g(): x = %d\" % x \n", "\n", "x = 22\n", "x = 33\n", "print \"In block inside main(): x = %d\" % x\n", "\n", "\n", "print \"In main(): x = %d\" % x \n", "print \"In main(): ::x = %d\" % x \n", "f()\n", "g()\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "In block inside main(): x = 33\n", "In main(): x = 33\n", "In main(): ::x = 33\n", "In f(): x = 44\n", "In g(): x = 33\n" ] } ], "prompt_number": 20 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.22, Page no: 109" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def max_(x, y,z=0):\n", " if x > y and x > y:\n", " return x\n", " elif y > x and y > z:\n", " return y\n", " else:\n", " return z\n", " \n", " \n", "print max(99,77), \" \" , max(55,66,33)\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "99 66\n" ] } ], "prompt_number": 21 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.23, Page no: 110" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "# prints the quotient of two input integers:\n", "print \"Enter two integers: \"\n", "n = int(raw_input())\n", "d = int(raw_input())\n", "if (d == 0):\n", " import sys\n", " sys.exit(0)\n", "print n , \"/\" , d , \" = \" , n/d \n", "\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Enter two integers: \n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "8\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "2\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "8 / 2 = 4\n" ] } ], "prompt_number": 22 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.24, Page no: 110" ] }, { "cell_type": "code", "collapsed": false, "input": [ "\n", "\n", "def reciprocal(x):\n", " #returns the reciprocal of x:\n", " if (x == 0):\n", " import sys\n", " sys.exit(1); # terminate the program\n", " return 1.0/x\n", "\n", "x = float(raw_input())\n", "print reciprocal(x)\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "25\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "0.04\n" ] } ], "prompt_number": 23 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.25, Page no: 111" ] }, { "cell_type": "code", "collapsed": false, "input": [ "'''\n", "This function evaluates the third degree polynomial a0 + a1x + a2x2 + a3x3. \n", "'''\n", "def p(x,a0,a1=0,a2=0,a3=0):\n", " # returns a0 + a1*x + a2*x^2 + a3*x^3:\n", " return (a0 + (a1 + (a2 + a3*x)*x)*x)\n", "\n", "\n", "# tests the p() function:\n", "x = 2.0003\n", "print \"p(x,7) = %f\" % p(x,7)\n", "print \"p(x,7,6) = %f\" % p(x,7,6)\n", "print \"p(x,7,6,5) = %f\" % p(x,7,6,5)\n", "print \"p(x,7,6,5,4) = %f\" % p(x,7,6,5,4)\n" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "p(x,7) = 7.000000\n", "p(x,7,6) = 19.001800\n", "p(x,7,6,5) = 39.007800\n", "p(x,7,6,5,4) = 71.022203\n" ] } ], "prompt_number": 24 } ], "metadata": {} } ] }