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Check if a Character is Vowel or Consonant - Java Program

Java

import java.util.Scanner;
 
public class VowelConsonantCheck {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        // Taking input from user
        System.out.print("Enter a character: ");
        char ch = sc.next().charAt(0); // Read single character
 
        // Convert to lowercase to simplify comparison
        ch = Character.toLowerCase(ch);
 
        // Check if alphabet
        if (ch < 'a' || ch > 'z') {
            System.out.println("Invalid input! Please enter an alphabet.");
        }
        else if (ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u') {
            System.out.println(ch + " is a Vowel.");
        }
        else {
            System.out.println(ch + " is a Consonant.");
        }
 
        sc.close();
    }
}

Output

 
OUTPUT 1:
Enter a character: A
a is a Vowel.

OUTPUT 2:
Enter a character: k
k is a Consonant.

OUTPUT 3: 
Enter a character: 9
Invalid input! Please enter an alphabet.

Explanation

✅ Step 1: Input

The user enters a single character:

char ch = sc.next().charAt(0);

This reads the first character of the user input.

✅ Step 2: Convert to lowercase

This ensures that both uppercase and lowercase characters are handled:

ch = Character.toLowerCase(ch);

✅ Step 3: Check if it is an alphabet

Characters outside 'a' to 'z' are invalid.

if (ch < 'a' || ch > 'z')

✅ Step 4: Check for vowel

We compare against the 5 vowels:

ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u'

✅ Step 5: Otherwise it is a consonant

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Introduction to Java

Check if a Character is Vowel or Consonant - Java Program

Output

Explanation