Data Type JavaScript DHTML

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  4. Check if it is a number and calculate the cubic power



function cubeme(aNum) {
    if (aNum == 1) {
        return 1;
    } else {
        return Math.pow(aNum,3);
    }
}




var theNum = 2;
var finalNum = cubeme(theNum);
if (isNaN(finalNum)) {
    alert("Not a number.");
} else {
    alert(finalNum);
}