path: root/Computer_Programming_Theory_and_Practice_/Chapter7.ipynb

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  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 1 , Page number: CP-148"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to count the occurence of a particular in a string\n",
      "# Variable declaration\n",
      "\n",
      "st = \"MISSISSIPPI\"\n",
      "ch = \"S\"\n",
      "count = 0\n",
      "\n",
      "print \"Enter the string :\",st\n",
      "print \"Which character to be counted ?\",ch\n",
      "\n",
      "# Loop to check occurrence of aa character\n",
      "\n",
      "l = len(st)\n",
      "\n",
      "for i in st:\n",
      "    if i == ch:\n",
      "        count = count + 1\n",
      "\n",
      "print \"The character \" + ch + \" occurs %d times\" % count        "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter the string : MISSISSIPPI\n",
        "Which character to be counted ? S\n",
        "The character S occurs 4 times\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 2 , Page number: CP-149"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to count the number of vowels in a sentence\n",
      "# Variable declaration\n",
      "\n",
      "st = \"This is a book\"\n",
      "count = 0\n",
      "\n",
      "print \"Enter the sentence :\"\n",
      "print st\n",
      "\n",
      "# Loop to count the vowels in the string\n",
      "\n",
      "for i in st:\n",
      "    if i == \"A\":\n",
      "        count = count + 1\n",
      "    elif i == \"E\":\n",
      "        count = count + 1\n",
      "    elif i == \"I\":\n",
      "        count = count + 1\n",
      "    elif i == \"O\":\n",
      "        count = count + 1\n",
      "    elif i == \"U\":\n",
      "        count = count + 1\n",
      "    elif i == \"a\":\n",
      "        count = count + 1\n",
      "    elif i == \"e\":\n",
      "        count = count + 1\n",
      "    elif i == \"i\":\n",
      "        count = count + 1\n",
      "    elif i == \"o\":\n",
      "        count = count + 1\n",
      "    elif i == \"u\":\n",
      "        count = count + 1\n",
      "\n",
      "print \"%d vowels are present in the sentence\" % count\n",
      "        \n",
      "        "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter the sentence :\n",
        "This is a book\n",
        "5 vowels are present in the sentence\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 3 , Page number: CP-150"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to test whether a given string is a palindrome or not\n",
      "# Variable declaration\n",
      "\n",
      "st = \"HYDERABAD\"\n",
      "rst = \"\"\n",
      "i = 0\n",
      "j = len(st) - 1\n",
      "\n",
      "print \"Enter the string :\",st\n",
      "\n",
      "# Palindrome or not \n",
      "\n",
      "rst = reversed(st)\n",
      "\n",
      "if list(st) == list(rst):\n",
      "    print \"%s is a palindrome string \" % st\n",
      "else:\n",
      "    print \"%s is not a palindrome string \" % st"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter the string : HYDERABAD\n",
        "HYDERABAD is not a palindrome string \n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 4 , Page number: CP-152"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to conctenate two strings\n",
      "# Variable declaration\n",
      "\n",
      "st1 = \"NEW \"\n",
      "st2 = \"DELHI\"\n",
      "\n",
      "# input of two strings to be concatenated\n",
      "\n",
      "print \"Enter first string :\",st1\n",
      "print \"Enter second string :\",st2\n",
      "\n",
      "# concatenation of two strings\n",
      "st = st1 + st2\n",
      "\n",
      "print \"Resultant string is \",st    "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter first string : NEW \n",
        "Enter second string : DELHI\n",
        "Resultant string is  NEW DELHI\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 5 , Page number: CP-154"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to compare two strings\n",
      "# Variable declaration\n",
      "\n",
      "st1 = \"ALPHA\"\n",
      "st2 = \"BETA\"\n",
      "\n",
      "print \"Enter string 1:\",st1\n",
      "print \"Enter string 2:\",st2\n",
      "\n",
      "# compare strings\n",
      "\n",
      "if (cmp(st1,st2)>0):\n",
      "    print \"%s \" + st1 + \"is alphabetically greater string\"\n",
      "else:\n",
      "    print st2 + \" is alphabetically greater string\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter string 1: ALPHA\n",
        "Enter string 2: BETA\n",
        "BETA is alphabetically greater string\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 6 , Page number: CP-155"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to sort an array of names in alphabetical order\n",
      "# Variable declaration\n",
      "\n",
      "n = 4\n",
      "names = [\"DEEPAK\",\"SHERIN\",\"SONIKA\",\"ARUN\"]\n",
      "\n",
      "print \"How many names ?\",n\n",
      "print \"Enter the 4 names one by one\"\n",
      "for i in names:\n",
      "    print i\n",
      "\n",
      "# Loop to arrange names in alphabetical order\n",
      "\n",
      "for i in range(0,n-1):\n",
      "    for j in range(i+1,n):\n",
      "        if cmp(names[i],names[j])>0:\n",
      "            \n",
      "            temp = names[i]\n",
      "            names[i] = names[j]\n",
      "            names[j] = temp\n",
      "\n",
      "print \"Names in alphabetical order\"\n",
      "for i in names:\n",
      "    print i"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "How many names ? 4\n",
        "Enter the 4 names one by one\n",
        "DEEPAK\n",
        "SHERIN\n",
        "SONIKA\n",
        "ARUN\n",
        "Names in alphabetical order\n",
        "ARUN\n",
        "DEEPAK\n",
        "SHERIN\n",
        "SONIKA\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 7 , Page number: CP-157"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to convert a line from lower case to upper case\n",
      "# Variable declaretion\n",
      "\n",
      "import sys\n",
      "\n",
      "st = ['l','o','g','i','c','a','l',' ','t','h','i','n','k','i','n','g',' ','i','s',' ','a',' ','m','u','s','t',' ','t','o',' ','l','e','a','r','n',' ','p','r','o','g','r','a','m','m','i','n','g']\n",
      "\n",
      "print \"Enter a sentence :\"\n",
      "for i in st:\n",
      "    print i,\n",
      "print     \n",
      "print \"The converted upper case string is\"\n",
      "# loop to convert lower case alphabet to upper case text\n",
      "for i in range(len(st)):\n",
      "    if st[i] >= 'a' and st[i] <= 'z':\n",
      "        st[i] = chr(ord(st[i])-32)\n",
      "\n",
      "\n",
      "    sys.stdout.write(st[i])"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter a sentence :\n",
        "l o g i c a l   t h i n k i n g   i s   a   m u s t   t o   l e a r n   p r o g r a m m i n g\n",
        "The converted upper case string is\n",
        "LOGICAL THINKING IS A MUST TO LEARN PROGRAMMING"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9 , Page number: CP-160"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to read a text and to omit al occurrences of a particular word\n",
      "# Variable declartion\n",
      "\n",
      "st = \"TO ACCESS THE NAME OF THE CITY IN THE LIST\"\n",
      "i = 0\n",
      "omit = \"THE\"\n",
      "l = len(st)\n",
      "j = 0\n",
      "word = []\n",
      "newst = \"\"\n",
      "onesps = \"\"\n",
      "print \"Enter a sentence :\"\n",
      "print st\n",
      "print \"Enter word to omit :\",omit\n",
      "\n",
      "# loop to omit the given word\n",
      "\n",
      "for i in range(l):\n",
      "    ch = i\n",
      "    if ch == ' ':\n",
      "        for j in word:\n",
      "            j = \" \" \n",
      "            if j == omit:\n",
      "                newst = j\n",
      "                newst = onesps\n",
      "            j = \" \"\n",
      "            j = 0\n",
      "        else:\n",
      "            j = ch\n",
      "            j = j + 1\n",
      "    i = i + 1\n",
      "\n",
      "print \"After omiting the word \" + omit\n",
      "print newst\n",
      "print \"Press any key to continue\"\n",
      "     "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter a sentence :\n",
        "TO ACCESS THE NAME OF THE CITY IN THE LIST\n",
        "Enter word to omit : THE\n",
        "After omiting the word THE\n",
        "\n",
        "Press any key to continue\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 10 , Page number: CP-161"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to calculate the amount to be paid for the telegram\n",
      "# Variable declaration\n",
      "\n",
      "count = 0\n",
      "st = \"Congratulations on your success in Examinations.\"\n",
      "l = len(st)\n",
      "\n",
      "print \"Type the sentence for Telegram\"\n",
      "print st\n",
      "\n",
      "# loop to count number of words\n",
      "\n",
      "for i in range(l):\n",
      "    if st[i] == '?':\n",
      "        count = count + 1\n",
      "\n",
      "if count <= 10:\n",
      "    amt = 5\n",
      "else:\n",
      "    amt = 5 + (count - 10) * 1.25\n",
      "\n",
      "print \"Amount to be paid for telegram = Rs.%0.2f\" % amt    "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Type the sentence for Telegram\n",
        "Congratulations on your success in Examinations.\n",
        "Amount to be paid for telegram = Rs.5.00\n"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 11 , Page number: CP-163"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# Program to count number of lines,words and characters\n",
      "# Variable declaration\n",
      "\n",
      "txt = \"What is a string? How do you initialize it? Explain with example.$\"\n",
      "st = \"\"\n",
      "i = 0\n",
      "lns = 0\n",
      "wds = 0\n",
      "chs = 0\n",
      "\n",
      "print \"Enter the text, type $ at end.\"\n",
      "print txt\n",
      "\n",
      "# loop to count lines,words and characters in text\n",
      "\n",
      "while txt[i] != '$':\n",
      "    # switch case statements\n",
      "    if txt[i] == ' ':\n",
      "        wds = wds + 1\n",
      "        chs = chs + 1\n",
      "    elif txt[i] == '.':\n",
      "        wds = wds + 1\n",
      "        lns = lns + 1\n",
      "        chs = chs + 1\n",
      "    elif txt[i] == '?':\n",
      "        lns = lns + 1\n",
      "    else: # default\n",
      "        chs = chs + 1\n",
      "\n",
      "    i = i + 1\n",
      "\n",
      "print \"Number of char (incl. blanks) =\",chs\n",
      "print \"Number of words =\",wds\n",
      "print \"Number of lines =\",lns\n",
      "\n",
      "\n",
      "        "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Enter the text, type $ at end.\n",
        "What is a string? How do you initialize it? Explain with example.$\n",
        "Number of char (incl. blanks) = 63\n",
        "Number of words = 12\n",
        "Number of lines = 3\n"
       ]
      }
     ],
     "prompt_number": 16
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
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