LetterClassifier.java

/*
Rahim Siddiq
Apr 21 2023
Vowel or consonant
*/

import java.util.Scanner;

public class LetterClassifier
{
    public static void main(String[] args)
    {
        // Program variables
        char letterChoice;

        // Title of program and description of program function to user
        System.out.println(" ====================================================================");
        System.out.println(" ========================= Vowel Or Consonat ========================");
        System.out.println(" ====================================================================");
        System.out.println("     Program determines whether a letter is a vowel or consonant    ");
        System.out.println(" --------------------------------------------------------------------");
        System.out.println();

        // Scanner object for input
        Scanner input = new Scanner(System.in);

        // User input
        System.out.print(" Please enter an alphabetic letter, then press [Enter]: ");
        letterChoice = input.next().charAt(0);
        // Convert input to lower case for comparison
        letterChoice = Character.toLowerCase(letterChoice);

        // Check if letter is entered 
        if (!Character.isLetter(letterChoice))
        {
            System.out.println(" Invalid input.");
        }
        else if (letterChoice == 'a' || letterChoice == 'e' || letterChoice == 'i' || letterChoice == 'o' || letterChoice == 'u')
        {
            System.out.println(" " + letterChoice + " is a vowel.");
        }
        else
        {
            System.out.println(" " + letterChoice + " is a consonant.");
        }
        // Close the Scanner to prevent resource leak
        input.close();
    }
}