Simple function returning 'undefined' value

Question

This is the function I am currently working on:

function getSmallestDivisor(xVal) {    

    if (xVal % 2 === 0) {
        return 2;
    } else if (xVal % 3          


        

Answer 1

if (xSqrt % 1 === 0) {
    return getSmallestDivisor(xSqrt); // missing return here
} else {
    return xVal;
}

Demo: Fiddle