# How to Write a Python Program to Check if a Given Number is an Armstrong Number?

To check if a given number is an Armstrong number, you can follow these steps to write a Python program:

1. Get the input number from the user.
2. Convert the input number to a string to iterate over its digits.
3. Calculate the number of digits in the input number using the `len()` function.
4. Initialize a variable `armstrong_sum` to 0. This variable will store the sum of the individual digits raised to the power of the number of digits.
5. Iterate over each digit of the input number using a `for` loop.
6. Convert each digit from string to an integer using the `int()` function.
7. Raise each digit to the power of the number of digits and add the result to the `armstrong_sum` variable.
8. After the loop, check if the `armstrong_sum` is equal to the original input number.
9. If the `armstrong_sum` is equal to the input number, print that the number is an Armstrong number. Otherwise, print that it is not.

Here’s the complete code for the program:

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

# Step 2: Convert the number to a string
num_str = str(num)

# Step 3: Calculate the number of digits
num_digits = len(num_str)

# Step 4: Initialize the armstrong sum
armstrong_sum = 0

# Step 5: Iterate over each digit
for digit in num_str:
# Step 6: Convert digit from string to integer
digit_int = int(digit)

# Step 7: Calculate the sum of digits raised to the power of the number of digits
armstrong_sum += digit_int ** num_digits

# Step 8: Check if the sum is equal to the original number
if armstrong_sum == num:
print(num, "is an Armstrong number.")
else:
print(num, "is not an Armstrong number.")``````

Now you can run the program, enter a number, and it will tell you whether the number is an Armstrong number or not.