Write a python program to check the given number is Armstrong or not usingwhile loop.

Sure, here is a Python program that checks if a given number is an Armstrong number or not using a while loop:

# Function to check if a number is Armstrong
def is_armstrong(num):
    # Initialize sum
    sum = 0
    # Find the length (order) of the number
    order = len(str(num))

    # Make a copy of num
    temp = num
    while temp > 0:
        digit = temp % 10
        sum += digit ** order
        temp //= 10

    # If the sum is equal to num, then it is an Armstrong number
    if num == sum:
        return True
    else:
        return False

# Test the function
num = int(input("Enter a number: "))
if is_armstrong(num):
    print(num, "is an Armstrong number")
else:
    print(num, "is not an Armstrong number")

This program works by first determining the number of digits in the number (the order). It then takes each digit of the number, raises it to the power of the order, and adds it to a sum. If the sum is equal to the original number, then the number is an Armstrong number.