Vowel or Consonant Checker in C#

This C# program takes an alphabet character as input and checks whether it is a vowel or a consonant. The program evaluates the character against the standard vowels (a, e, i, o, u) and displays the result. This exercise introduces basic input handling, character comparison, and conditional logic in C#.

Source Code 💻 #

using System;

class Program
{
    static void Main()
    {
        // Prompt user to enter a character
        Console.Write("Enter an alphabet: ");
        char ch = Char.ToLower(Console.ReadKey().KeyChar);
        Console.WriteLine(); // For new line after input

        // Check if the input is a letter
        if (!Char.IsLetter(ch))
        {
            Console.WriteLine("Please enter a valid alphabet.");
        }
        else
        {
            // Check if the alphabet is a vowel or consonant
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
            {
                Console.WriteLine($"{ch} is a vowel.");
            }
            else
            {
                Console.WriteLine($"{ch} is a consonant.");
            }
        }
    }
}

Explanation #

• The program prompts the user to input a character.
• It converts the character to lowercase using Char.ToLower() to handle both uppercase and lowercase inputs.
• The program first checks if the input is a valid alphabet using Char.IsLetter(). If not, it asks for a valid input.
• If the input is a valid alphabet, it checks whether the character is a vowel by comparing it to ‘a’, ‘e’, ‘i’, ‘o’, and ‘u’.
• If the character is not a vowel, it is a consonant.
• The result is printed accordingly.

Example #

• Input: A

• Output: a is a vowel.

• Input: z

• Output: z is a consonant.

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