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Language/Type: JavaScript for loops loop mystery
Author: Melissa Hovik (on 2016/09/25)

What is the output of the following JavaScript code?

for (let i = 1; i <= 2; i++) {
    let mystery = "";
    for (let j = 1; j <= 3; j++) {
        for (let k = 1; k <= 4; k++) {
            mystery += "*";
        mystery += "!";

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