Count characters at same position as in English alphabet

Difficulty Level : Basic
Last Updated : 06 Nov, 2020

Given a string of lower and uppercase characters, the task is to find that how many characters are at same position as in English alphabet.

Examples:

Input:  ABcED 
Output :  3
First three characters are at same position
as in English alphabets.

Input:  geeksforgeeks 
Output :  1
Only 'f' is at same position as in English
alphabet

Input :  alphabetical 
Output :  3

Recommended: Please try your approach on {IDE} first, before moving on to the solution.

For this we can have simple approach:

1) Initialize result as 0.
2) Traverse input string and do following for every 
   character str[i]
     a) If 'i' is same as str[i] - 'a' or same as 
        str[i] - 'A', then do result++
3) Return result

C++

// C++ program to find number of characters at same
// position as in English alphabets
#include<bits/stdc++.h>
using namespace std;
  
int findCount(string str)
{
    int result = 0;
  
    // Traverse input string
    for (int i = 0 ; i < str.size(); i++)
  
        // Check that index of characters of string is
        // same as of English alphabets by using ASCII
        // values and the fact that all lower case
        // alphabetic characters come together in same
        // order in ASCII table.  And same is true for
        // upper case.
        if (i == (str[i] - 'a') || i == (str[i] - 'A'))
            result++;
  
  
    return result;
}
  
// Driver code
int main()
{
    string str = "AbgdeF";
    cout << findCount(str);
    return 0;
}

Java

// Java program to find number of 
// characters at same position 
// as in English alphabets
class GFG
{
  
    static int findCount(String str) 
    {
        int result = 0;
  
        // Traverse input string
        for (int i = 0; i < str.length(); i++) 
          
        // Check that index of characters 
        // of string is same as of English 
        // alphabets by using ASCII values 
        // and the fact that all lower case
        // alphabetic characters come together 
        // in same order in ASCII table. And 
        // same is true for upper case.
        {
            if (i == (str.charAt(i) - 'a')
                    || i == (str.charAt(i) - 'A')) 
            {
                result++;
            }
        }
        return result;
    }
  
    // Driver code
    public static void main(String[] args) 
    {
        String str = "AbgdeF";
        System.out.print(findCount(str));
    }
}
  
// This code is contributed by Rajput-JI

Python3

# Python program to find number of 
# characters at same position as 
# in English alphabets 
  
# Function to count the number of 
# characters at same position as 
# in English alphabets 
def findCount(str):
    result = 0
  
    # Traverse the input string
    for i in range(len(str)):
  
        # Check that index of characters of string is 
        # same as of English alphabets by using ASCII 
        # values and the fact that all lower case 
        # alphabetic characters come together in same 
        # order in ASCII table. And same is true for 
        # upper case. 
        if ((i == ord(str[i]) - ord('a')) or 
            (i == ord(str[i]) - ord('A'))):
            result += 1
    return result
  
# Driver Code
str = 'AbgdeF'
print(findCount(str))
  
# This code is contributed
# by SamyuktaSHegde

C#

// C# program to find number of 
// characters at same position 
// as in English alphabets
using System;
  
class GFG
{
static int findCount(string str)
{
    int result = 0;
  
    // Traverse input string
    for (int i = 0 ; i < str.Length; i++)
  
        // Check that index of characters 
        // of string is same as of English 
        // alphabets by using ASCII values 
        // and the fact that all lower case
        // alphabetic characters come together 
        // in same order in ASCII table. And 
        // same is true for upper case.
        if (i == (str[i] - 'a') || 
            i == (str[i] - 'A'))
            result++;
  
    return result;
}
  
// Driver code
public static void Main()
{
    string str = "AbgdeF";
    Console.Write(findCount(str));
}
}
  
// This code is contributed 
// by Akanksha Rai

PHP

<?php
// PHP program to find number of 
// characters at same position as
// in English alphabets 
  
// Function to count the number of 
// characters at same position as
// in English alphabets 
function findCount($str)
{
    $result = 0;
  
    // Traverse the input string
    for ($i = 0; $i < strlen($str); $i++)
    {
  
        // Check that index of characters of string is 
        // same as of English alphabets by using ASCII 
        // values and the fact that all lower case
        // alphabetic characters come together in same 
        // order in ASCII table. And same is true for
        // upper case. 
        if (($i == ord($str[$i]) - ord('a')) or
            ($i == ord($str[$i]) - ord('A')))
            $result += 1;
    }
    return $result;
}
  
// Driver Code
$str = "AbgdeF";
print(findCount($str))
  
// This code has been contributed by 29AjayKumar
?>

Output:

This article is contributed by Sahil Chhabra. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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Related Articles

Recommended: Please try your approach on {IDE} first, before moving on to the solution.

C++

Java

Python3

C#

PHP