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;
 }
}