WhileLoopPractice

import javax.swing.JOptionPane;

public class WhileLoopsPractice {
    public static void main(String[] args) {
        float a = Float.parseFloat(JOptionPane.showInputDialog("Type a number to get the sqrt (negative number to exit)"));
        while(a >= 0) {
            JOptionPane.showMessageDialog(null, Math.sqrt(a));
            a = Float.parseFloat(JOptionPane.showInputDialog("Type a number to get the sqrt (negative number to exit)"));

        }

        char b = (JOptionPane.showInputDialog("Enter a letter to check if its a vowel (# to exit)")).charAt(0);
        while(b != '#') {
            if(b=='a'||b=='e'|b=='i'||b=='o'||b=='u')
                JOptionPane.showMessageDialog(null,b+ " is a vowel");
            else
                JOptionPane.showMessageDialog(null,b+" is not a vowel");
            b = (JOptionPane.showInputDialog("Enter a letter to check if its a vowel (# to exit)")).charAt(0);

        }

        int c = Integer.parseInt(JOptionPane.showInputDialog("Enter a letter to check if its a vowel (# to exit)"));
        while(c <= 255 && c >=0) {
            JOptionPane.showMessageDialog(null,(int)c);
            c = Integer.parseInt(JOptionPane.showInputDialog("Enter a letter to check if its a vowel (# to exit)"));
        }
    }

}