package Maths;

/**
 * https://en.wikipedia.org/wiki/Perfect_square
 */
public class PerfectSquare {
    public static void main(String[] args) {
        assert !isPerfectSquare(-1);
        assert !isPerfectSquare(3);
        assert !isPerfectSquare(5);
        assert isPerfectSquare(9);
        assert isPerfectSquare(100);
    }

    /**
     * Check if a number is perfect square number
     *
     * @param number the number to be checked
     * @return <tt>true</tt> if {@code number} is perfect square, otherwise <tt>false</tt>
     */
    public static boolean isPerfectSquare(int number) {
        int sqrt = (int) Math.sqrt(number);
        return sqrt * sqrt == number;
    }
}