Program to count occurrence of a given character in a string

Difficulty Level : Basic
Last Updated : 16 Jun, 2021

Given a string and a character, task is to make a function which count occurrence of the given character in the string.
Examples:

Input : str = "geeksforgeeks"
         c = 'e'
Output : 4
'e' appears four times in str.

Input : str = "abccdefgaa"
          c = 'a' 
Output : 3
'a' appears three times in str.

C++

// C++ program to count occurrences of a given
// character
#include <iostream>
#include <string>
using namespace std;
 
// Function that return count of the given
// character in the string
int count(string s, char c)
{
    // Count variable
    int res = 0;
 
    for (int i=0;i<s.length();i++)
 
        // checking character in string
        if (s[i] == c)
            res++;
 
    return res;
}
 
// Driver code
int main()
{
    string str= "geeksforgeeks";
    char c = 'e';
    cout << count(str, c) << endl;
    return 0;
}

Java

// JAVA program to count occurrences
// of a character
 
class GFG
{
    // Method that return count of the given
    // character in the string
    public static int count(String s, char c)
    {
        int res = 0;
 
        for (int i=0; i<s.length(); i++)
        {
            // checking character in string
            if (s.charAt(i) == c)
            res++;
        }
        return res;
    }
     
    // Driver method
    public static void main(String args[])
    {
        String str= "geeksforgeeks";
        char c = 'e';
        System.out.println(count(str, c));
    }
}

Python3

# Python program to count occurrences
# of a given character
 
# Method that return count of the
# given character in the string
def count(s, c) :
     
    # Count variable
    res = 0
     
    for i in range(len(s)) :
         
        # Checking character in string
        if (s[i] == c):
            res = res + 1
    return res
     
     
# Driver code
str= "geeksforgeeks"
c = 'e'
print(count(str, c))
     
# This code is contributed by "rishabh_jain".

C#

// C# program to count occurrences
// of a character
using System;
         
public class GFG {
     
    // Method that return count of the given
    // character in the string
    public static int count(string s, char c)
    {
        int res = 0;
 
        for (int i = 0; i < s.Length; i++)
        {
             
            // checking character in string
            if (s[i] == c)
            res++;
        }
         
        return res;
    }
     
    // Driver method
    public static void Main()
    {
        string str = "geeksforgeeks";
        char c = 'e';
         
        Console.WriteLine(count(str, c));
    }
}
 
// This code is contributed by Sam007.

PHP

<?php
// PHP program to count
// occurrences of a given
// character
 
// Function that return count of
// the given character in the string
function countt($s, $c)
{
     
    // Count variable
    $res = 0;
 
    for ($i = 0; $i < strlen($s); $i++)
 
        // checking character in string
        if ($s[$i] == $c)
            $res++;
 
    return $res;
}
 
    // Driver Code
    $str= "geeksforgeeks";
    $c = 'e';
    echo countt($str, $c) ;
    return 0;
     
// This code is contributed by nitin mittal.
?>

Javascript

<script>
// JAVASCRIPT program to count occurrences
// of a character
    // Method that return count of the given
    // character in the string
    function count(s, c)
    {
        let res = 0;
 
        for (let i = 0; i < s.length; i++)
        {
            // checking character in string
            if (s.charAt(i) == c)
            res++;
        }
        return res;
    }
     
    // Driver method  
        let str= "geeksforgeeks";
        let c = 'e';
        document.write(count(str, c));
         
 // This code is contributed by shivanisinghss2110      
 </script>

Using Direct Function in C++

C

// CPP program to count occurrences of
// a character using library
#include<bits/stdc++.h>
using namespace std;
 
// Driver code
int main()
{
    string str = "geeksforgeeks";
    char c = 'e';
   
    // Count returns number of occurrences of
    // c between two given positions provided
    // as two iterators.
    cout << count(str.begin(), str.end(), c);
    return 0;
}

]
Output:

Using recursion

Java

/*package whatever //do not write package name here */
 
import java.io.*;
 
class GFG {
      static int countinString(char ch, String s)
    {
          //base case;
        if(s.length()==0)
            return 0;
          int count = 0;
       
          //checking if the first character of
          //the given string is that character
          //or not
          if(s.charAt(0)==ch)
          count++;
       
          //this will count the occurrence of
          //given character in the string
          //from index 1 to the last
          //index of the string
          count+=countinString(ch,s.substring(1));
       
           
        return count;
    }
    public static void main (String[] args) {
        String str= "geeksforgeeks";
        char c = 'e';
        System.out.println(countinString(c,str));
    }
}

Output:

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