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recursiveTracing

Language/Type: Java recursion recursive tracing
Author: Robert Baxter

For each call to the following method, indicate what value is returned:

public static int mystery(int n) {
    if (n < 0) {
        return -mystery(-n);
    } else if (n < 10) {
        return (n + 1) % 10;
    } else {
        return 10 * mystery(n / 10) + (n + 1) % 10;
    }
}
mystery(7)
mystery(42)
mystery(385)
mystery(-790)
mystery(89294)

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