Programming-Idioms

Idiom

# 361 Test for perfect squarity

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Set the boolean b to true if the integer n is a square number, false otherwise

E.g. 2025 → true

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import static java.lang.Math.sqrt;

boolean b = sqrt(n) % 1 == 0;

math

b := round(sqrt(n)) ** 2 = n;

b := number mod (round(sqrt(number)) = 0;

import math

b = math.sqrt(n).is_integer()

class Integer
  def perfect_square?
    Integer.sqrt(self)**2 == self
  end
end

b = n.perfect_square?

let b = n.isqrt().pow(2) == n;