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 "metadata": {
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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 07 : User Defined Functions"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 1, page no.5.49"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to demonstrate Local and Global Declaration \n",
      "\n",
      "#variable declaration globally\n",
      "i=0                \n",
      "print \"Value of i in main\", i\n",
      "\n",
      " #define function\n",
      "def f1():        \n",
      "    k=0\n",
      "    i=50\n",
      "    print \"Value of i after function call\",i\n",
      "    \n",
      "#Function Call\n",
      "f1()             \n",
      "\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Value of i in main 0\n",
        "Value of i after function call 50\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 2, page no: 5.50"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to demonstrate usage of local and global variable\n",
      "\n",
      "for i in range(0,3):\n",
      "    print \"Value of i is:\", i\n",
      "    \n",
      "i=590\n",
      "print \"The Value of i is:\", i    \n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Value of i is: 0\n",
        "Value of i is: 1\n",
        "Value of i is: 2\n",
        "The Value of i is: 590\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 3, Page no.5.52"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to call function without parameters\n",
      "def message():\n",
      "    print \"Main Message\"\n",
      "    \n",
      "print \"Function Message\"\n",
      "\n",
      "message()\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Function Message\n",
        "Main Message\n"
       ]
      }
     ],
     "prompt_number": 24
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 4, Page No.5.52"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to call function with parameter\n",
      "\n",
      "#Defining function\n",
      "def add(x,y):\n",
      "    z=0\n",
      "    z=x+y\n",
      "    return z\n",
      "\n",
      "k=add(10,20)\n",
      "\n",
      "#Result\n",
      "print \"The Value of k is \", k"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The Value of k is  30\n"
       ]
      }
     ],
     "prompt_number": 25
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 5, page no.5.53"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to write prototype of the function\n",
      "\n",
      "k=0\n",
      "\n",
      "#Defining in function\n",
      "def f1(k):\n",
      "    k=k+100\n",
      "    return k\n",
      "\n",
      "#Result\n",
      "print \"The value of i before call: \", k\n",
      "\n",
      "print \"The Value of i after call: \",(f1(k))\n",
      "\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The value of i before call:  0\n",
        "The Value of i after call:  100\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example: 6, page no. 5.54"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Program to write prototype definition in main function\n",
      "\n",
      "def fun(k):\n",
      "    k=k+10\n",
      "    return k\n",
      "\n",
      "i=0\n",
      "\n",
      "#Result\n",
      "print  \"The i value before call %d\\n\"%(i)\n",
      "print \"The i value after call %d\\n\"%fun(i)\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The i value before call 0\n",
        "\n",
        "The i value after call 10\n",
        "\n"
       ]
      }
     ],
     "prompt_number": 4
    }
   ],
   "metadata": {}
  }
 ]
}