Python Program to check armstrong number or not

In this simple python program, we need to check for an Armstrong number. It's a beginner-level python program.

To understand this example, you should have knowledge of the following Python programming topics:

What is an Armstrong number?

In this basic python program, we need to know what is mean by an Armstrong number. Armstrong number is a number in which the sum of the cube if total digits in the number will be equal to the number itself.

For example, let us take the example of a number 153 and so to check that number is Armstrong number or not, we need to take the cube of 1 and 5 and 3 and add that cubes together and check the result is equal to 153 or not using an if condition in python. If it's 153, it's Armstrong's number. Else not. Here 1+125+27 =153, so it is an Armstrong number.

How to implement an Armstrong number check in python?

In this simple python program, We have to accept the user's number and initialize the sum and temp variables. Use a while loop in python until the number is greater than zero. Split the number into digits using mod operator by 10 and calculate the sum of every digit's cube in a number. Finally, divide the number by 10 removing one digit from the number. Then take the cube of that digit and sum the digit cube with others.


STEP 1: Accept the number from the user to check for Armstrong using the input function in the python programming language and convert that string to an integer using int().

STEP 2: Initialize the sum as zero and use a temp variable to save the number from the user.

STEP 3: Add a while loop for splitting the number from the user and calculating the sum of the cube of each digit.

STEP 4: Take one digit from the number using the mod operator.

STEP 5: Calculate the sum as sum + cube of that digit.

STEP 6: Divide the number with 10 to remove that digit and continue the loop.

STEP 7: Use an if condition to check the num = sum, and if it is correct, print the number is Armstrong else, not Armstrong using the print statement in python language.

Python Source Code

                                          number = int(input("Enter a number: "))  
sum = 0  
temp = number  
while temp > 0:  
   integer = temp % 10   
   sum += integer ** 3  
   temp //= 10  

if number == sum:  
   print(number,"is an Armstrong number")  
   print(number,"is not an Armstrong number")  


Enter a number:  153

153 is an Armstrong number