Java/Maths/PerfectSquare.java at master · loisoft/Java · GitHub

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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;

}

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