{
 "metadata": {
  "name": "ch5"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": "Chapter 5 : Fruitful functions"
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.1 page no :41\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.1 page no :41\n'''\nimport math\ndef area (radius):\n    area = math.pi * radius * radius;\n    return area;\n\nprint area(3)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "28.2743338823\n"
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.2 page no :42\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.2 page no :42\n'''\n\ndef absoluteValue (x):\n    if (x < 0):\n        return -x\n    else:\n        return x\n\nprint absoluteValue(-3)                \nprint absoluteValue(3)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "3\n3\n"
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.3 page no :44\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.3 page no :44\n'''\n\ndef distance (x1, y1,x2,y2):\n    dx = x2 - x1\n    dy = y2 - y1;\n    print  \"dx is \" , dx\n    print \"dy is \" , dy \n    return 0.0\n\ndistance(10,10,20,20)    ",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "dx is  10\ndy is  10\n"
      },
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 3,
       "text": "0.0"
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.4 page no :44\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.4 page no :44\n'''\n\ndef distance (x1, y1,x2,y2):\n    dx = x2 - x1\n    dy = y2 - y1;\n    dsquared = dx*dx + dy*dy;\n    print \"dsquared is \" , dsquared\n    return 0.0;\n\ndistance(10,10,20,20)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "dsquared is  200\n"
      },
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 4,
       "text": "0.0"
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.5 page no :45\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.5 page no :45\n'''\nimport math\ndef distance (x1, y1,x2,y2):\n    dx = x2 - x1\n    dy = y2 - y1;\n    dsquared = dx*dx + dy*dy;\n    return math.sqrt(dsquared)\n    \nprint distance(10,10,20,20)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "14.1421356237\n"
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.6 page no :45\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.6 page no :45\n'''\n\nimport math\ndef area (radius):\n    area = math.pi * radius * radius;\n    return area;\n\ndef distance (x1, y1,x2,y2):\n    dx = x2 - x1\n    dy = y2 - y1;\n    dsquared = dx*dx + dy*dy;\n    return math.sqrt(dsquared)\n    \ndef fred(xc, yc, xp,yp):\n    radius = distance (xc, yc, xp, yp);\n    result = area (radius);\n    return result;\n\nprint fred(10,10,20,20)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "628.318530718\n"
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.7 page no :48\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.7 page no :48\n'''\ndef isSingleDigit(x):\n    if (x >= 0 and x < 10):\n        return True\n    else:\n        return False;\n\nprint isSingleDigit(11)\nprint isSingleDigit(4)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "False\nTrue\n"
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.8 page no :51/53\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.8 page no :51/53\n'''\n\ndef factorial (n):\n    if (n == 0):\n        return 1;\n    else:\n        recurse = factorial (n-1)\n        result = n * recurse\n        return result;\n\nprint factorial(5)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "120\n"
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": "example 5.9 page no :53\n"
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "'''\nexample 5.9 page no :53\n'''\ndef fibonacci (n):\n    if (n == 0 or n == 1):\n        return 1\n    else:\n        return fibonacci (n-1) + fibonacci (n-2)\n\nprint fibonacci(5)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "8\n"
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "",
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}