A number is an Armstrang number or narcissistic number only if its is equal to the sum of its own digits raised to the power of the number of digits. It sounds complicated but I will try to make it easy. For example 3 is an armstrong number. Beacuse total number of digits has only 1. And if we try to power this with 1 we will get 3 and the total sum is also 3. That’s why 3 is an armstrong number.

Now we will see how we can find armstrong number in python:

For loop to be used find armstrong numbers between 0 to 1000

t = 0  
for i in range(1001):  
power = len(str(i))  
result = 0  
num = i  
  
while i != 0:  
    digit = i % 10  
    result = result + digit**power  
    i = i // 10  
if num == result:  
    print(result)  
    t += 1  
  
print('Total Number of Armstrong ' + str(t))