NumberCast

public class NumberCast {

    public static void main(String[] args) {
        System.out.print("Enter a number between 0 to 35: "); // ask for a number
        Scanner scanner = new Scanner(System.in); // get input
        try { // catch exception when number is not entered
            int n = scanner.nextInt(); // get integer from scanner
            if (n >= 0 && n <= 35) { // n must lie between 0 and 35
                if (n <= 9) {
                    System.out.println("==> " + n); // if n<9 display as it is
                } else {
                    // ASCII VALUE OF A = 65
                    System.out.println("==> " + (char) (55 + n)); // adding 55 to n and casting to char if n>9
                }
            } else {
                System.out.println("INVALID NUMBER"); // numbers other than those from 0 to 35 are invalid
            }
        } catch (Exception e) {
            System.out.println("NOT A NUMBER"); // "not a number" if number is not entered
        }
        scanner.close(); // close the scanner
    }

}