A square of squares

You like building blocks. You especially like building blocks that are squares. And what you even like more, is to arrange them into a square of square building blocks! However, sometimes, you can't arrange them into a square. Instead, you end up with an ordinary rectangle! Those blasted things! If you just had a way to know, whether you're currently working in vain… Wait! That's it! You just have to check if your number of building blocks is a perfect square.

My code:


                        var isSquare = function(n) {
                            if (n < 0) return false; 
                            let sqrt = Math.sqrt(n); 
                            return sqrt === Math.floor(sqrt); 
                          }

And that's the best solution among all users:


                        function isSquare(n) {
                            return Math.sqrt(n) % 1 === 0;
                          }

New things I learned today:

I learned today that using the modulo operation with 1 checks if a number is an integer, because the remainder will be the decimal part of the number if it's not an integer.