Complete the method, isPerfectSquare (). The method takes in a positive integer, n. It returns a boolean that is true if n is a perfect square, false otherwise. A perfect square is an integer whose square root is also an integer. You may assume that n is a positive integer.

Hint: find the square root of n, cast it to an int value, then square it and compare this square to n.

Starter code:-

public class Square {

public static boolean isPerfectSquare (int n) {

//TODO: complete this method

}

}

Question

Adison Dalton

Computers & Technology

21 July, 18:04

Complete the method, isPerfectSquare (). The method takes in a positive integer, n. It returns a boolean that is true if n is a perfect square, false otherwise. A perfect square is an integer whose square root is also an integer. You may assume that n is a positive integer.

Hint: find the square root of n, cast it to an int value, then square it and compare this square to n.

Starter code:-

public class Square {

public static boolean isPerfectSquare (int n) {

//TODO: complete this method

}

}

+2

Answers (1)

Know the Answer?

Harold Walters · Answer 1

public class Square { public static boolean isPerfectSquare (int n) { int sqrt_n = (int) Math. sqrt (n); if (sqrt_n * sqrt_n = = n) { return true; }else{ return false; } } }

Explanation:

Firstly, use sqrt method from Math package to calculate the square root of input n (Line 3). Cast the result to integer and assign it to sqrt_n variable.

Next, square the sqrt_n and check if it is equal to input n (Line 4). If so, return true, if not, return false (Line 4-8).