Armstrong Number Program in Python

By SivamPython
armstrong number program in python
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Table of Contents

What is Armstrong number in python ?

An Armstrong number is a number that is equal to the sum of its own digits raised to the power of the number of digits. Let’s write a Python program to check if a given number is an Armstrong number or not, and I’ll provide a stepwise algorithm along with it.

Stepwise algorithm to check Armstrong number:

  1. Start by taking input from the user for the number to be checked.
  2. Calculate the total number of digits in the given number. You can achieve this by converting the number to a string and then using the len()
  3. Initialize a variable sum to 0. This variable will store the sum of the digits raised to the power of the number of digits.
  4. Iterate through each digit in the number.
  5. For each digit, raise it to the power of the total number of digits and add it to the sum
  6. After iterating through all the digits, check if the calculated sum is equal to the original number.
  7. If the sum is equal to the original number, then it is an Armstrong number. Otherwise, it is not.
  8. Print the result accordingly.

To determine if a Armstrong Number program in Python, you can use the following code:

				
					# Step 1: Take input from the user
number = int(input("Enter a number: "))

# Step 2: Calculate the number of digits
num_digits = len(str(number))

# Step 3: Initialize sum variable
sum = 0

# Step 4: Iterate through each digit
temp = number
while temp > 0:
    digit = temp % 10

    # Step 5: Calculate sum of digits raised to the power of num_digits
    sum += digit ** num_digits
    temp //= 10

# Step 6: Check if sum is equal to the original number
if sum == number:
    print(number, "is an Armstrong number.")
else:
    print(number, "is not an Armstrong number.")

Input: 

				
					Enter the number:153

Output: 

				
					153 is an Armstrong Number