C# Program to Count Number of Vowels and Consonants in a Given String

C# is a general-purpose programming language it is used to create mobile apps, desktop apps, web

sites, and games. As we know that a, e, i, o, u are vowels, and the remaining alphabet is known as a consonant in English so now using C# language we will create a program that will return us the total number of vowels and consonants present in the given string.

Example:

Input: geeksforgeeks
Output: Total number of vowels = 5
Total number of consonants = 8

Input: HelloGFG
Output: Total number of vowels = 2
Total number of consonants = 6

Approach: 

To print the total number of Vowels and consonants from a given String we use the following approach: 

• Store the string using string datatype.
• Declare two variables to count the number of vowels and consonants.
• Now using the length property find the length of the given string
• Now iterate the string from left to right and check if the character is either vowel or a consonant.
• If the character encountered is a vowel increase the count of vowel else increases the count of consonant.

Example 1:

C#

// C# program to print the total number of Vowels
// and consonants from a given string
using System;
class GFG{

public static void Main()
{
    string inputstring;
    int i, len, vowels, consonants;

    inputstring = "geeksforgeeks";
    vowels = 0;
    consonants = 0;
    len = inputstring.Length;

    // Iterating the string from left to right
    for(i = 0; i < len; i++)
    {

        // Check if the character is a vowel
        if (inputstring[i] == 'a' || inputstring[i] == 'e' ||
            inputstring[i] == 'i' || inputstring[i] == 'o' ||
            inputstring[i] == 'u' || inputstring[i] == 'A' ||
            inputstring[i] == 'E' || inputstring[i] == 'I' ||
            inputstring[i] == 'O' || inputstring[i] == 'U')
        {

            // Increment the vowels
            vowels++;
        }

        // Check if the character is a alphabet
        // other than vowels
        else if ((inputstring[i] >= 'a' && inputstring[i] <= 'z') ||
                 (inputstring[i] >= 'A' && inputstring[i] <= 'Z'))
        {

            // Increment the consonants
            consonants++;
        }
    }

    // Display the count of vowels and consonant
    Console.WriteLine("count of vowel = " + vowels);
    Console.WriteLine("count of consonant = " + consonants);
}
}

Output

count of vowel = 5
count of consonant = 8

Example 2:

C#

// C# program to print the total number of Vowels
// and consonants from a given string
using System;
class GFG{

public static void Main()
{
    char[] inputstring = new char[100];
    int i, vowels, consonants, x;

    vowels = 0;
    consonants = 0;

    // Enter the length of the string
    Console.WriteLine("Please enter the length of the string:\n");
    x = int.Parse(Console.ReadLine());

    // Enter the string
    Console.WriteLine("Enter string:\n");
    for (i = 0; i < x; i++)
    {
        inputstring[i] = Convert.ToChar(Console.Read());
    }

    // Iterating the string
    for (i = 0; inputstring[i] != '\0'; i++)
    {

        // Check if the character is a vowel
        if (inputstring[i] == 'a' || inputstring[i] == 'e' ||
            inputstring[i] == 'i' || inputstring[i] == 'o' ||
            inputstring[i] == 'u' || inputstring[i] == 'A' ||
            inputstring[i] == 'E' || inputstring[i] == 'I' ||
            inputstring[i] == 'O' || inputstring[i] == 'U')
        {

            // Increment the vowels
            vowels++;
        }

        else
        {

            // Increment the consonants
            consonants++;
        }
    }

    // Display the count of vowels and consonant
    Console.WriteLine("\ncount of vowel = " + vowels);
    Console.WriteLine("count of consonant = " + consonants);

    Console.ReadLine();
    Console.ReadLine();
}
}

Output:

Please enter the length of the string:
6
Enter string:
HeyGFG
count of vowel = 1
count of consonant = 5