input: Write a function in Python to determine if a specified number is a perfect square.
  assert is_Perfect_Square(10) == False
  assert is_Perfect_Square(36) == True
  assert is_Perfect_Square(14) == False
output: def is_Perfect_Square(num):
      if num < 0:
          return False
      root = int(num ** 0.5)
      return root * root == num