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+{
+ "metadata": {
+  "name": "Chapter V"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 5: Program looping"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.1, Page number: 43"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.1.py\n",
+      "#Calculating the Eighth Triangular Number\n",
+      "\n",
+      "#Variable Declaration\n",
+      "triangularNumber = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8;\n",
+      "\n",
+      "#Result\n",
+      "print(\"The eighth triangular number is {0}\".format(triangularNumber))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The eighth triangular number is 36\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.2, Page number: 44"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.2.py\n",
+      "#Calculating the 200th Triangular Number\n",
+      "\n",
+      "#Variable Declaration\n",
+      "triangularNumber=0\n",
+      "\n",
+      "#Calculation\n",
+      "for i in range (201):\n",
+      "   triangularNumber=triangularNumber+i   \n",
+      "\n",
+      "#Result\n",
+      "print(\"The 200th triangular number is {0}\".format(triangularNumber))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The 200th triangular number is 20100\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.3, Page number: 47"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.3.py\n",
+      "#Generating a Table of Triangular Numbers\n",
+      "\n",
+      "print(\"TABLE OF TRIANGULAR NUMBERS\\n\\n\")\n",
+      "print(\" n          Sum from 1 to n\\n\")\n",
+      "print(\"---        -----------------\\n\")\n",
+      "\n",
+      "#Variable Declarations\n",
+      "triangularNumber=0\n",
+      "\n",
+      "#Calculation/Result\n",
+      "for i in range (1,11):\n",
+      "    triangularNumber=triangularNumber+i\n",
+      "    print(\" {0}                  {1}\\n\".format(i,triangularNumber))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "TABLE OF TRIANGULAR NUMBERS\n",
+        "\n",
+        "\n",
+        " n          Sum from 1 to n\n",
+        "\n",
+        "---        -----------------\n",
+        "\n",
+        " 1                  1\n",
+        "\n",
+        " 2                  3\n",
+        "\n",
+        " 3                  6\n",
+        "\n",
+        " 4                  10\n",
+        "\n",
+        " 5                  15\n",
+        "\n",
+        " 6                  21\n",
+        "\n",
+        " 7                  28\n",
+        "\n",
+        " 8                  36\n",
+        "\n",
+        " 9                  45\n",
+        "\n",
+        " 10                  55\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.4, Page number: 51"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.4.py\n",
+      "#Asking the User for Input\n",
+      "\n",
+      "#Variable Declaration/User Input\n",
+      "triangularNumber=0\n",
+      "number=10                                #number=input(\"What triangular number do you want?\")\n",
+      "\n",
+      "#Calculations\n",
+      "for n in range (1,(number+1)):\n",
+      "        triangularNumber+=n\n",
+      "\n",
+      "#Result\n",
+      "print(\"triangular number {0} is {1}\".format(number,triangularNumber))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "triangular number 10 is 55\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.5, Page number: 53"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.5.py\n",
+      "#Using Nested for Loops\n",
+      "\n",
+      "#Calculations\n",
+      "for counter in range(1,6):                     #Outer Loop\n",
+      "        number=12                              #input(\"what triangular number do you want? \")\n",
+      "\n",
+      "        triangularNumber=0                     #Variable Decaration\n",
+      "\n",
+      "        for n in range (1,(number+1)):         #Inner Loop\n",
+      "           triangularNumber+=n\n",
+      "        \n",
+      "        #Result\n",
+      "        print(\"Triangular Number {0} is {1}\".format(number,triangularNumber))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Triangular Number 12 is 78\n",
+        "Triangular Number 12 is 78\n",
+        "Triangular Number 12 is 78\n",
+        "Triangular Number 12 is 78\n",
+        "Triangular Number 12 is 78\n"
+       ]
+      }
+     ],
+     "prompt_number": 7
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.6, Page number: 56"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.6.py\n",
+      "#Introducing the while Statement\n",
+      "\n",
+      "#Variable Declaration\n",
+      "count=1\n",
+      "\n",
+      "#Calculation/Iteration `\n",
+      "while (count<=5):\n",
+      "        print(\"{0}\\n\".format(count))     #Result\n",
+      "        count+=1"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "1\n",
+        "\n",
+        "2\n",
+        "\n",
+        "3\n",
+        "\n",
+        "4\n",
+        "\n",
+        "5\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 9
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.7, Page number: 58"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.7.py\n",
+      "#Finding the Greatest Common Divisor\n",
+      "\n",
+      "print(\"Please type in two nonnegative integers.\")\n",
+      "#Variable Declaration/User Input\n",
+      "u=8                                               #u=input()\n",
+      "v=14                                              #v=input()\n",
+      "\n",
+      "#Calculation\n",
+      "while(v!=0):\n",
+      "        temp=u%v\n",
+      "        u=v\n",
+      "        v=temp\n",
+      "\n",
+      "#Result\n",
+      "print(\"Their greatest common divisor is {0}\\n\".format(u))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Please type in two nonnegative integers.\n",
+        "Their greatest common divisor is 2\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 11
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.8, Page number: 60"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.8.py\n",
+      "#Reversing the Digits of a Number\n",
+      "\n",
+      "#Import Library\n",
+      "import sys\n",
+      "\n",
+      "#Variable declaration/User Input\n",
+      "number=113                                     #number=input(\"Enter your number.\\n\")\n",
+      "\n",
+      "#Calculation/Result\n",
+      "while(number!=0):\n",
+      "        right_digit=number%10\n",
+      "        sys.stdout.write(\"{0}\".format(right_digit))\n",
+      "        number=number/10\n",
+      "\n",
+      "print(\"\\n\")"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "311\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 13
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 5.9, Page number: 61"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#5.9.py\n",
+      "#Implementing a Revised Program to Reverse the Digits of a Number\n",
+      "#(do-while equivalent code)\n",
+      "\n",
+      "#Import Library\n",
+      "import sys\n",
+      "\n",
+      "#Variable Declaration/User Input\n",
+      "number=428                                      #number=input(\"Enter your number:\\n\")\n",
+      "\n",
+      "#Calculation/Result\n",
+      "while True:                                     #Enter loop instantly for the first time\n",
+      "    right_digit=number%10\n",
+      "    sys.stdout.write(\"{0}\".format(right_digit))\n",
+      "    number=number/10\n",
+      "    if(number == 0):                            #Check for exit condition\n",
+      "        break\n",
+      "\n",
+      "print(\"\\n\")"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "824\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 14
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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