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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 6: Decision and control statements"
     ]
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 6.1, Page number: 114"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "# Variable declaration\n",
      "old_number = 1\n",
      "current_number = 1\n",
      "\n",
      "print ('1')\n",
      "\n",
      "# Calculation and result\n",
      "while (current_number < 100) :\n",
      "   print (current_number)\n",
      "   next_number = current_number + old_number\n",
      "\n",
      "   old_number = current_number\n",
      "   current_number = next_number"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1\n",
        "1\n",
        "2\n",
        "3\n",
        "5\n",
        "8\n",
        "13\n",
        "21\n",
        "34\n",
        "55\n",
        "89\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 6.2, Page number: 115"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "# Variable declaration\n",
      "total = 0\n",
      "i = 0\n",
      "\n",
      "# Calculation\n",
      "while (i < 10) :\n",
      "   item = 1\n",
      "\n",
      "   if item == 0 :\n",
      "      break\n",
      "\n",
      "   total += item\n",
      "   print ('Total: %d' % total)\n",
      "   i = i + 1\n",
      "        \n",
      "# Result\n",
      "print ('Final total: %d' % total)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Total: 1\n",
        "Total: 2\n",
        "Total: 3\n",
        "Total: 4\n",
        "Total: 5\n",
        "Total: 6\n",
        "Total: 7\n",
        "Total: 8\n",
        "Total: 9\n",
        "Total: 10\n",
        "Final total: 10\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 6.3, Page number: 116"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "# Variable declaration\n",
      "total = 0\n",
      "minus_items = 0\n",
      "i = 0\n",
      "\n",
      "# Calculation\n",
      "while (i < 10) :\n",
      "   item = 1\n",
      "   \n",
      "   if item == 0 :\n",
      "      break\n",
      "\n",
      "   if item < 0 :\n",
      "      minus_items += 1\n",
      "      continue\n",
      "\n",
      "   total += item\n",
      "   print ('Total: %d' % total)\n",
      "   i = i + 1\n",
      "            \n",
      "# Result\n",
      "print ('Final total: %d' % total)\n",
      "print ('with %d negative items omitted' % minus_items)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Total: 1\n",
        "Total: 2\n",
        "Total: 3\n",
        "Total: 4\n",
        "Total: 5\n",
        "Total: 6\n",
        "Total: 7\n",
        "Total: 8\n",
        "Total: 9\n",
        "Total: 10\n",
        "Final total: 10\n",
        "with 0 negative items omitted\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 3,
     "metadata": {},
     "source": [
      "Example 6.4, Page number: 118"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "# Variable declaration\n",
      "balance_owed = 100\n",
      "\n",
      "# Calculation and result\n",
      "if balance_owed == 0 :\n",
      "   print ('You owe nothing.')\n",
      "else :\n",
      "   print ('You owe %d dollars.' % balance_owed)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "You owe 100 dollars.\n"
       ]
      }
     ],
     "prompt_number": 3
    }
   ],
   "metadata": {}
  }
 ]
}