input: from typing import List
  
  
  def primeCheck(num: int) -> bool:
      """ Check if the given number is a prime number.
      >>> primeCheck(3)
      True
      >>> primeCheck(4)
      False
      """
output:     if num <= 1:
          return False
      for i in range(2, int(num**0.5) + 1):
          if num % i == 0:
              return False
      return True