🚀 Day 34/150 – 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 total digits.
Example: 153 = 1³ + 5³ + 3³ = 153

Let’s explore different ways to check Armstrong number in Python 👇

🔹 Method 1 – Using while Loop

n = 153
temp = n
digits = len(str(n))
total = 0

while n > 0:
    digit = n % 10
    total += digit ** digits
    n //= 10

if temp == total:
    print("Armstrong Number")
else:
    print("Not Armstrong Number")

✅ Best numeric method.

🔹 Method 2 – Taking User Input

n = int(input("Enter a number: ")) temp = n digits = len(str(n)) total = 0 while n > 0: digit = n % 10 total += digit ** digits n //= 10 print("Armstrong Number" if temp == total else "Not Armstrong Number")

✅ Useful for dynamic programs.

🔹 Method 3 – Using for Loop + String

n = 153
digits = len(str(n))

total = sum(int(i) ** digits for i in str(n))

if n == total:
    print("Armstrong Number")
else:
    print("Not Armstrong Number")

✅ Short and clean method.

🔹 Method 4 – Using Function

def is_armstrong(n):
    digits = len(str(n))
    total = sum(int(i) ** digits for i in str(n))
    return n == total

print(is_armstrong(153))

✅ Reusable for projects.

📌 Example Output

For 153

Armstrong Number

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🎯 Best Method?

✔ while loop → best for logic building
✔ for loop + string → shortest method
✔ function → reusable and clean