25 lines
689 B
Java
25 lines
689 B
Java
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package Maths;
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/**
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* https://en.wikipedia.org/wiki/Perfect_square
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*/
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public class PerfectSquare {
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public static void main(String[] args) {
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assert !isPerfectSquare(-1);
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assert !isPerfectSquare(3);
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assert !isPerfectSquare(5);
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assert isPerfectSquare(9);
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assert isPerfectSquare(100);
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}
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/**
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* Check if a number is perfect square number
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*
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* @param number the number to be checked
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* @return <tt>true</tt> if {@code number} is perfect square, otherwise <tt>false</tt>
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*/
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public static boolean isPerfectSquare(int number) {
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int sqrt = (int) Math.sqrt(number);
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return sqrt * sqrt == number;
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}
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}
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