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 "metadata": {
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  "signature": "sha256:6797b9444a439c70039a1e66c231ad4d494ff12505798711ee0fd43c452323b7"
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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Hour 15: Working with Functions"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 15.1, Page No 245"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def function_1(x,y):\n",
      "    print \"Within Function_1.\"\n",
      "    return (x+y)\n",
      "def function_2(x,y):\n",
      "    print \"Within Function_2.\"\n",
      "    return (x+y)\n",
      "\n",
      "x1=80\n",
      "y1=10\n",
      "x2=float\n",
      "y2=float\n",
      "x2=100.123456\n",
      "y2=10.123456\n",
      "print \"Pass function_1 %d\" % x1,\n",
      "print \" and %d\" % y1\n",
      "print \"Function_1 returns %d\" % function_1(x1,y1)\n",
      "print \"Pass function_2 %f\" % x2,\n",
      "print \" and %f\" % y2\n",
      "print \"Function_1 returns %f\" % function_2(x2,y2)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Pass function_1 80  and 10\n",
        "Within Function_1.\n",
        "Function_1 returns 90\n",
        "Pass function_2 100.123456  and 10.123456\n",
        "Within Function_2.\n",
        "Function_1 returns 110.246912\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 15.2, Page No 248"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import time\n",
      "def GetDateTime():\n",
      "    print \"Within GetDateTime().\"\n",
      "    print \"Current date and time is %s\" % str(time.strftime(\"%a %b %d %X %Y\"))\n",
      "\n",
      "print \"Before the GetDateTime() function is called.\"\n",
      "GetDateTime()\n",
      "print \"After The GetDateTime() function is called.\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Before the GetDateTime() function is called.\n",
        "Within GetDateTime().\n",
        "Current date and time is Mon Nov 10 11:08:33 2014\n",
        "After The GetDateTime() function is called.\n"
       ]
      }
     ],
     "prompt_number": 23
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 15.3, Page No 253"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def AddDouble(*args):\n",
      "    result=float\n",
      "    result=0.0\n",
      "    print \"The number of arguments is \"+ str(len(args))\n",
      "    for i in range(len(args)):\n",
      "        result= result + args[i]\n",
      "    return result\n",
      "\n",
      "d1=float\n",
      "d2=float\n",
      "d3=float\n",
      "d4=float\n",
      "d1=1.5\n",
      "d2=2.5\n",
      "d3=3.5\n",
      "d4=4.5\n",
      "\n",
      "print \"Given an argument: %2.1f\" % d1\n",
      "print \"The result returned by AddDouble() is: %2.1f \\n\" % AddDouble(d1)\n",
      "\n",
      "print \"Given an argument: %2.1f\" % d1,\n",
      "print \" and %2.1f\" % d2\n",
      "print \"The result returned by AddDouble() is: %2.1f \\n\" % AddDouble(d1,d2)\n",
      "\n",
      "print \"Given an argument: %2.1f\" % d1,\n",
      "print \", %2.1f\" % d2,\n",
      "print \" and %2.1f\" % d3\n",
      "print \"The result returned by AddDouble() is: %2.1f \\n\" % AddDouble(d1,d2,d3)\n",
      "\n",
      "print \"Given an argument: %2.1f\" % d1,\n",
      "print \", %2.1f\" % d2,\n",
      "print \", %2.1f\" % d3,\n",
      "print \" and %2.1f\" % d4\n",
      "print \"The result returned by AddDouble() is: %2.1f \\n\" % AddDouble(d1,d2,d3,d4)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Given an argument: 1.5\n",
        "The number of arguments is 1\n",
        "The result returned by AddDouble() is: 1.5 \n",
        "\n",
        "Given an argument: 1.5  and 2.5\n",
        "The number of arguments is 2\n",
        "The result returned by AddDouble() is: 4.0 \n",
        "\n",
        "Given an argument: 1.5 , 2.5  and 3.5\n",
        "The number of arguments is 3\n",
        "The result returned by AddDouble() is: 7.5 \n",
        "\n",
        "Given an argument: 1.5 , 2.5 , 3.5  and 4.5\n",
        "The number of arguments is 4\n",
        "The result returned by AddDouble() is: 12.0 \n",
        "\n"
       ]
      }
     ],
     "prompt_number": 6
    }
   ],
   "metadata": {}
  }
 ]
}