You can get the rest of a number by using % operator.
For example,
1.5 % 1 ==> 0.5
In this certain case author checks if sqrt of a number is a integer number.

i flagged this comment as spoiler be cause some one could think this is a solution och might get an idea. Iknow it does not reveal the full answer, but could give a hinch to where to start. If im exaggerating then of course im sorry for exaggerating :)

I like this one.

Why don't you help with a good solution or explain why there is a better approach instead? :) We all are learing and having fun here.

This was beutiful and easy to understand

oh im truly sorry for missing that. it wasnt my intention of course. New to this site and i will use that

// Sinan

Please use spoiler flag next time.

Please use spoiler flag next time.