function start() {
    println(" This program plays a guessing game. ");
    println(" The computer is thinking of a value between 0 and 100 ");
    println(" Type '-1' to exit the program ");

    var num = Randomizer.nextInt(0,100);
    while(true){
        var guess = readLine(" What is your guess? ");


        if(guess > num){
            println(" Your guess was too high. ");
        }

        if(guess < num){
            println(" Your guess was too low. ");
        }

        if(guess == num){
            println(" Correct!" );
            break;
        }
        if(guess == -1){
            break;
            println(" Game has concluded.");
        }
    }
}