input: 
  def is_prime(num):
      """Check if a number is prime by iterating from 2 to the square root of the number.
      >>> is_prime(2)
      True
      >>> is_prime(4)
      False
      >>> is_prime(7)
      True
      """
      # Iterate from 2 to the square root of the number
      for i in range(2, int(num ** 0.5) + 1):
          if num % i == 0:
              return False
      return True
  
  # Iterate from 2 to n
  for n in range(2, n+1):
      # Check if the number is prime
      if is_prime(n):
          print(n)
  
output:     
      if num <= 1:
          return False
      return True
  