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while loop mystery

Language/Type: Java method basics mod mystery while loops
Author: Marty Stepp (on 2010/12/28)

Given the following method: 

public static void whileMystery(int x, int y) {
    while (x > 0 && y > 0) {
        x = x - y;
        y--;
        System.out.print(x + " ");
    }

    System.out.println(y);
}

Write the output of each of the following calls.

whileMystery(7, 5);
whileMystery(20, 4);
whileMystery(40, 10);

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