void main() {
    int largest = 0;

    for (int i = 0; i < 5; i++) {
        String answer = IO.readln("Enter a number: ");
        if (answer == null) {
            break;
        }
        int value = Integer.parseInt(answer.strip());
        if (value > largest) {
            largest = value;
        }
    }

    IO.println("The largest was " + largest + ".");
}

// From Groundwork, chapter 5 (ch05-repetition), box 11.
// This example is from Groundwork, licensed CC BY-NC-SA 4.0.
// Run with: java ch05_11.java