input: Write a function that checks if a given number is an Armstrong number. An Armstrong number is a number that is equal to the sum of its own digits each raised to the power of the number of digits. The function should return True if the number is an Armstrong number, and False otherwise.
  
  def is_armstrong_number(num):
      n = len(str(num))
      temp = num
      sum_of_digits = 0
  
      while temp > 0:
          digit = temp % 10
          sum_of_digits += digit ** n
          temp //= 10
  
      if num == sum_of_digits:
          return True
      else:
          return False
  
  assert is_armstrong_number(153) == True
  assert is_armstrong_number(370) == True
  assert is_armstrong_number(120) == False
  assert is_armstrong_number(9474) == True
  assert is_armstrong_number(1234) == False
output: def is_armstrong_number(num):
      n = len(str(num))
      temp = num
      sum_of_digits = 0
  
      while temp > 0:
          digit = temp % 10
          sum_of_digits += digit ** n
          temp //= 10
  
      if num == sum_of_digits:
          return True
      else:
          return False