Python Program to Check Armstrong Number

Introduction

In this article, we will explore the concept of Armstrong numbers and learn how to write a Python program to check whether a given number is an Armstrong number or not.

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Armstrong numbers, also known as narcissistic numbers, are special numbers that are equal to the sum of their digits raised to the power of the number of digits in the number itself.

For example, 153 is an Armstrong number because 1^3 + 5^3 + 3^3 = 153.

How to Check for an Armstrong Number

To check whether a number is an Armstrong number or not, we need to follow a few steps:

1. Convert the number to a string to determine the number of digits.
2. Calculate the sum of the digits raised to the power of the number of digits.
3. Compare the calculated sum with the original number.
4. If the calculated sum is equal to the original number, then the number is an Armstrong number.

Let’s dive into the Python program to implement this logic.

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Python Program: Checking for an Armstrong Number

def is_armstrong_number(number):
    # Convert the number to a string
    num_str = str(number)
    
    # Calculate the number of digits
    num_digits = len(num_str)
    
    # Calculate the sum of the digits raised to the power of the number of digits
    armstrong_sum = sum(int(digit)**num_digits for digit in num_str)
    
    # Compare the calculated sum with the original number
    if armstrong_sum == number:
        return True
    else:
        return False

# Test the function
number = 153
if is_armstrong_number(number):
    print(f"{number} is an Armstrong number")
else:
    print(f"{number} is not an Armstrong number")

The above Python program defines a function is_armstrong_number() that takes a number as an argument and checks whether it is an Armstrong number or not.

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The program converts the number to a string, calculates the number of digits, and then calculates the sum of the digits raised to the power of the number of digits.

Finally, it compares the calculated sum with the original number and returns True or False accordingly.

Python Program to Check Armstrong Number – FAQs

Conclusion

In this article, we learned about Armstrong numbers and how to write a Python program to check whether a given number is an Armstrong number or not.

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We explored the concept of Armstrong numbers, discussed the steps involved in checking for an Armstrong number, and provided a Python program that implements the logic.

By using the program, you can easily verify if a number is an Armstrong number or not. So go ahead, try out the program, and have fun exploring the world of Armstrong numbers!

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