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YoureASquare.java
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YoureASquare.java
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package kyu7;
/*
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.
Task
Given an integral number, determine if it's a square number:
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.
The tests will always use some integral number, so don't worry about that in dynamic typed languages.
Examples
-1 => false
0 => true
3 => false
4 => true
25 => true
26 => false
*/
public class YoureASquare {
public static boolean isSquare(int n) {
return Math.sqrt(n) % 1 == 0;
}
}