input: Write a function to check if a given number is an Armstrong number. If the number is an Armstrong number return True else return False.
  def is_armstrong_number(num):
    order = len(str(num))
    sum = 0
    temp = num
    while temp > 0:
      digit = temp % 10
      sum += digit ** order
      temp //= 10
    if num == sum:
      return True  
    else:
      return False
  assert is_armstrong_number(153)==True
  assert is_armstrong_number(370)==True
  assert is_armstrong_number(9474)==True
  assert is_armstrong_number(123)==False
  assert is_armstrong_number(490)==False
output: def is_armstrong_number(num):
    order = len(str(num))
    sum = 0
    temp = num
    while temp > 0:
      digit = temp % 10
      sum += digit ** order
      temp //= 10
    return num == sum