Question

Write Java program Lab51.java which takes in a string from the user, converts it to an array of characters (char[] word) and calls the method:

• public static int countVowels(char[])

which returns the number of vowels in word. (You have to write countVowels(char[]) ).

Answer 1

import java.util.Scanner;

public class Lab51 {

    public static int countVowels(char[] arr) {
        int count = 0;
        char ch;
        for (int i = 0; i < arr.length; i++) {
            ch = arr[i];
            if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
                    ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
                ++count;
            }
        }
        return count;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String line = in.nextLine();
        char[] arr = line.toCharArray();
        System.out.println("Number of vowels is " + countVowels(arr));
    }
}