Java program to find whether given character is vowel or consonant using switch case

A switch statement in Java allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each case. To verify whether given character is a vowel read a character from the user into a variable (say ch).

Problem Statement

Given a character, write a Java program to determine whether it is a vowel or a consonant using a switch statement.

Input

Enter a character :
a

Output

Given character is an vowel

Steps to check whether given character is vowel or consonant

Below are the steps to check whether given character is vowel or consonant ?

• First we will import the Scanner class from java.util package.
• Define a boolean variable bool and initialize it with false.
• Define cases for character ch with vowel characters, both capital and small ('a', 'e', 'i', 'o', 'u' ) without break statements.
• For all these assigns make the bool variable true.
• Finally, if the value of the bool variable is true given character is a vowel else consonant.

Java program to check whether given character is vowel or consonant

A program that demonstrates this is given as follows:

import java.util.Scanner;
public class VowelOrConsonantSwitch {
    public static void main(String args[]) {
        boolean bool = false;
        System.out.println("Enter a character :");
        Scanner sc = new Scanner(System.in);
        char ch = sc.next().charAt(0);
        switch(ch) {
        case 'A' :
        case 'E' :
        case 'I' :
        case 'O' :
        case 'U' :
        case 'a' :
        case 'e' :
        case 'i' :
        case 'o' :
        case 'u' :
            bool = true;
        }
        if(bool == true) {
            System.out.println("Given character is an vowel ");
        } else {
            System.out.println("Given character is a consonant ");
        }
    }
}

Output

Enter a character :
a
Given character is an vowel
Enter a character :
l
Given character is a consonant

Code Explanation

This Java program starts by importing java.util.Scanner to read user input and initializes a boolean variable bool to false. The user is prompted to enter a character, stored in the variable ch. A switch statement then checks ch against all vowel characters (both uppercase and lowercase). If ch matches a vowel, bool is set to true. Finally, the program checks bool and prints "Given character is a vowel" if true, or "Given character is a consonant" if false.