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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:c8fa15513a66bcc3c782e246851674786a1e5f0313759a5d553c588db3808162"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 5: Operators & Expressions"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.1, page no. 62"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "a = 20.5\n",
+      "b = 6.4\n",
+      "\n",
+      "print \"a = \", a\n",
+      "print \"b = \", b\n",
+      "print \"a+b = \", (a+b)\n",
+      "print \"a-b = \", (a-b)\n",
+      "print \"a*b = \", (a*b)\n",
+      "print \"a/b = \", (a/b)\n",
+      "print \"a%b = \", (a%b)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "a =  20.5\n",
+        "b =  6.4\n",
+        "a+b =  26.9\n",
+        "a-b =  14.1\n",
+        "a*b =  131.2\n",
+        "a/b =  3.203125\n",
+        "a%b =  1.3\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.2, page no. 64"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "a = 15.0\n",
+      "b = 20.75\n",
+      "c = 15.0\n",
+      "print \"a = \", a\n",
+      "print \"b = \", b\n",
+      "print \"c = \", c\n",
+      "print \"a<b is \", (a<b)\n",
+      "print \"a>b is \", (a>b)\n",
+      "print \"a==c is \", (a==c)\n",
+      "print \"a<=c is \", (a<=c)\n",
+      "print \"a>=b is \", (a>=b)\n",
+      "print \"b!=c is \", (b!=c)\n",
+      "print \"b==(a+c) is \", (b==(a+c))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "a =  15.0\n",
+        "b =  20.75\n",
+        "c =  15.0\n",
+        "a<b is  True\n",
+        "a>b is  False\n",
+        "a==c is  True\n",
+        "a<=c is  True\n",
+        "a>=b is  False\n",
+        "b!=c is  True\n",
+        "b==(a+c) is  False\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.3, page no. 67"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "#there is no inrement operator in Python, we will use += instead\n",
+      "\n",
+      "m = 10\n",
+      "n = 20\n",
+      "print \"m = \", m\n",
+      "print \"n = \", n\n",
+      "m+=1\n",
+      "print \"++m = \", m \n",
+      "print \"n++ = \", n\n",
+      "n+=1\n",
+      "print \"m = \", m\n",
+      "print \"n = \", n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "m =  10\n",
+        "n =  20\n",
+        "++m =  11\n",
+        "n++ =  20\n",
+        "m =  11\n",
+        "n =  21\n"
+       ]
+      }
+     ],
+     "prompt_number": 18
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.4, page no. 73"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "my_sum = 0\n",
+      "for i in range(1, 11):\n",
+      "    my_sum = my_sum + (1/float(i))\n",
+      "    print \"i = \", i,\n",
+      "    print \"sum = \", my_sum"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "i =  1 sum =  1.0\n",
+        "i =  2 sum =  1.5\n",
+        "i =  3 sum =  1.83333333333\n",
+        "i =  4 sum =  2.08333333333\n",
+        "i =  5 sum =  2.28333333333\n",
+        "i =  6 sum =  2.45\n",
+        "i =  7 sum =  2.59285714286\n",
+        "i =  8 sum =  2.71785714286\n",
+        "i =  9 sum =  2.82896825397\n",
+        "i =  10 sum =  2.92896825397\n"
+       ]
+      }
+     ],
+     "prompt_number": 21
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.5, page no. 74"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "my_list = []\n",
+      "my_list.append(1)\n",
+      "my_list.append(2)\n",
+      "l = len(my_list)-1\n",
+      "total = 0\n",
+      "while l >= 0:\n",
+      "    total = total + my_list[l]\n",
+      "    l -= 1\n",
+      "print \"The total amount is \", total"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The total amount is  3\n"
+       ]
+      }
+     ],
+     "prompt_number": 23
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 5.6, page no. 77"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "a = 10\n",
+      "b = 5\n",
+      "c = 8\n",
+      "d = 2\n",
+      "x = 6.4\n",
+      "y = 3.0\n",
+      "\n",
+      "answer1 = a * b + c / d\n",
+      "answer2 = a * (b+c) / d\n",
+      "\n",
+      "answer3 = a/c\n",
+      "answer4 = float(a)/c\n",
+      "answer5 = a / y\n",
+      "\n",
+      "answer6 = a % c\n",
+      "answer7 = float(x%y)\n",
+      "\n",
+      "bool1 = a > b and c > d\n",
+      "bool2 = a < b and c > d\n",
+      "bool3 = a < b or c > d\n",
+      "bool4 = not(a - b == c)\n",
+      "\n",
+      "print \"Order of Evaluation\"\n",
+      "print \"a * b + c / d = \", answer1\n",
+      "print \"a * (b+c) / d = \", answer2\n",
+      "\n",
+      "print \"Type Conversion\"\n",
+      "print \"a / c = \", answer3\n",
+      "print \"float(a)/c = \", answer4\n",
+      "print \"a / y = \", answer5\n",
+      "\n",
+      "print \"Modulo Operations\"\n",
+      "print \"a % c = \", answer6\n",
+      "print \"x % y = \", answer6\n",
+      "\n",
+      "print \"Logical Operations\"\n",
+      "print \"a > b and c > d = \", bool1\n",
+      "print \"a < b and c > d = \", bool2\n",
+      "print \"a < b or c > d = \", bool3\n",
+      "print \"not(a - b == c) \", bool4"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Order of Evaluation\n",
+        "a * b + c / d =  54\n",
+        "a * (b+c) / d =  65\n",
+        "Type Conversion\n",
+        "a / c =  1\n",
+        "float(a)/c =  1.25\n",
+        "a / y =  3.33333333333\n",
+        "Modulo Operations\n",
+        "a % c =  2\n",
+        "x % y =  2\n",
+        "Logical Operations\n",
+        "a > b and c > d =  True\n",
+        "a < b and c > d =  False\n",
+        "a < b or c > d =  True\n",
+        "not(a - b == c)  True\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
\ No newline at end of file