input: def primeCheck(num: int) -> bool:
      """
      Check if a given number is a prime number.
      
      >>> primeCheck(7)
      True
      >>> primeCheck(6)
      False
      >>> primeCheck(2)
      True
      >>> primeCheck(1)
      False
      """
      if num > 1:
          for i in range(2, num):
              if (num % i) == 0:
                  return False
          return True
      return False
output:     if num > 1:
          for i in range(2, int(num**0.5) + 1):
              if (num % i) == 0:
                  return False
          return True
      return False