import java.util.Scanner;

/**

* Laboratory 4 Program number 2 is an application that detects whether an is a consonant letter, vowel, or if an input is not a letter.

* Group 13

* Authors: Lobingco, Kenneth F.

* Islanan, Lenito Laurencio Lamberto

* Laboratory Exercise 4 Program 2

* Date: March 19, 2021

*/

public class IT1A_Group13_Lab4_Prog2

{

public static void main (String [] args) {

String letter;

int length;

boolean isItTrueorFalse;

char characterDeclare;

Scanner scanInput = new Scanner (System.in);

System.out.print("Enter a letter: ");

letter = scanInput.nextLine();

characterDeclare = letter.charAt(0);

length = letter.length();

isItTrueorFalse = Character.isLetter(characterDeclare);

if (characterDeclare == 'a' || characterDeclare == 'A' || characterDeclare == 'e' || characterDeclare == 'E' || characterDeclare == 'i' || characterDeclare == 'I' || characterDeclare == 'o' || characterDeclare == 'O' || characterDeclare == 'u' || characterDeclare == 'U') {

System.out.println("Letter " + letter + " is a vowel");

}

else {

if (length > 1) {

System.out.println("Error! Enter single letter only ");

}

else if (isItTrueorFalse == true){

System.out.println("Letter " + letter + " is a consonant");

}

else if (isItTrueorFalse != true){

System.out.println("Error! " + letter + " is not a letter");

}

}

}

}