## DEV Community

Divyajyoti Ukirde

Posted on • Updated on

# Easy peasy perfect square

The question is to return true if the number is perfect square otherwise false.
A perfect square is an integer that is the square of an integer.
Javascript provides numerous ways to write a code for this. I will let you know that this is what I did:

``````const isSquare = (n) => {
return  (Math.sqrt(n) === Math.ceil(Math.sqrt(n)));
}
``````

Below is the solution that impressed me, because it is simple Math my brain couldn't get hold of first:

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

And it is clever and also follows the best practices!

Checking the datatype would also work using `isInteger`. But you never know when it would get obsolete! Languages change but the Math around remains the same! Choose better! Divyajyoti Ukirde • Edited

That is very much correct. It shows your knowledge in the language is really good. Also, it is always better to know the underlying operations. :) Saurabh Sharma

It shows your knowledge in the language is really good

Stack overflow 