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parameterMystery2

Language/Type: JavaScript parameter mystery reference semantics
Author: Melissa Hovik (on 2016/09/25)

Assume the following functions are defined: 

function main() {
    let x = 15;
    let y = 12;
    let z = -1;
    mystery(x, z, y);
    mystery(1, 20.5, x);
    mystery(z - x, z * y, x * (z + 1));
}

function mystery(z, y, x) {
    console.log(z + " - " + x + " = " + y);
}
What console output would result from calling main?
mystery(x, z, y);
mystery(1, 20.5, x);
mystery(z - x, z * y, x * (z + 1));

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