Count consonants in a string (Iterative and recursive methods)

Given a string, count total number of consonants in it. A consonant is a English alphabet character that is not vowel (a, e, i, o and u). Examples of constants are b, c, d, f, g, ..

Examples :

Input : abc de
Output : 3
There are three consonants b, c and d.

Input : geeksforgeeks portal
Output : 12

1. Iterative Method

C++

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// Iterative CPP program to count total number
// of consonants 
#include <iostream>
using namespace std;
  
// Function to check for consonant
bool isConsonant(char ch)
{
    // To handle lower case
    ch = toupper(ch);
  
    return !(ch == 'A' || ch == 'E' || 
            ch == 'I' || ch == 'O' || 
            ch == 'U') && ch >= 65 && ch <= 90;
}
  
int totalConsonants(string str)
{
    int count = 0;
    for (int i = 0; i < str.length(); i++) 
  
        // To check is character is Consonant
        if (isConsonant(str[i]))
            ++count;
    return count;
}
  
// Driver code
int main()
{
    string str = "abc de";
    cout << totalConsonants(str);
    return 0;
}

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Java














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// Iterative Java program 


// to count total number 


// of consonants  


  


import java.io.*; 


  


class GFG { 


  


    // Function to check for consonant 


    static boolean isConsonant(char ch) 


    { 


        // To handle lower case 


        ch = Character.toUpperCase(ch); 


       


        return !(ch == 'A' || ch == 'E' ||  


                ch == 'I' || ch == 'O' ||  


                ch == 'U') && ch >= 65 && ch <= 90; 


    } 


   


    static int totalConsonants(String str) 


    { 


        int count = 0; 


        for (int i = 0; i < str.length(); i++)  


       


            // To check is character is Consonant 


            if (isConsonant(str.charAt(i))) 


                ++count; 


        return count; 


    } 


      


    // Driver code 


    public static void main(String args[]) 


    { 


        String str = "abc de"; 


        System.out.println( totalConsonants(str)); 


    } 


} 


  


// This code is contributed by Nikita Tiwari. 



















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Python3














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# Iterative Python3 program to count  


# total number of consonants  


  


# Function to check for consonant 


def isConsonant(ch): 


      


    # To handle lower case 


    ch = ch.upper() 


  


    return not (ch == 'A' or ch == 'E' or 


                ch == 'I' or ch == 'O' or 


                ch == 'U') and ord(ch) >= 65 and ord(ch) <= 90


  


def totalConsonants(string): 


      


    count = 0


      


    for i in range(len(string)): 


  


        # To check is character is Consonant 


        if (isConsonant(string[i])): 


            count += 1


              


    return count 


  


# Driver code 


string = "abc de"


print(totalConsonants(string)) 


  


  


# This code id contributed by Ansu Kumari. 



















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C#














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// Iterative C# program to count  


// total number of consonants  


using System; 


  


class GFG { 


  


    // Function to check for consonant 


    static bool isConsonant(char ch) 


    { 


        // To handle lower case 


        ch = Char.ToUpper(ch); 


      


        return !(ch == 'A' || ch == 'E' ||  


                 ch == 'I' || ch == 'O' ||  


                 ch == 'U') && ch >= 65 && ch <= 90; 


    } 


  


    static int totalConsonants(String str) 


    { 


        int count = 0; 


        for (int i = 0; i < str.Length; i++)  


      


            // To check is character is Consonant 


            if (isConsonant(str[i])) 


                ++count; 


        return count; 


    } 


      


    // Driver code 


    public static void Main() 


    { 


        String str = "abc de"; 


        Console.Write( totalConsonants(str)); 


    } 


} 


  


// This code is contributed by nitin mittal. 



















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PHP














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<?php  


// Iterative PHP program to count total number 


// of consonants  


   


// Function to check for consonant 


function isConsonant($ch) 


{ 


    // To handle lower case 


    $ch = strtoupper($ch); 


   


    return !($ch == 'A' || $ch == 'E' ||  


            $ch == 'I' || $ch == 'O' ||  


            $ch == 'U') && ord($ch) >= 65 && ord($ch) <= 90; 


} 


   


function totalConsonants($str) 


{ 


    $count = 0; 


    for ($i = 0; $i < strlen($str); $i++)  


   


        // To check is character is Consonant 


        if (isConsonant($str[$i])) 


            ++$count; 


    return $count; 


} 


   


// Driver code 


  


$str = "abc de"; 


echo totalConsonants($str); 


return 0; 


 // This code is contributed by Ita_c. 


?> 



















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