3.24 – Armstrong Number Program Using While Loop | Python Programming – New Series
Welcome to the Python Programming – Complete Course (New Series) by Burle Sharma.
In this class (3.24), we solve an important and popular number problem:
👉 Write a program to accept a number and check whether it is an Armstrong number or not.
An Armstrong number is a number where the sum of the digits raised to the power of number of digits is equal to the original number.
In this video, I have:
✔ Written the expected output clearly
✔ Explained the problem statement properly
✔ Written the complete program
✔ Performed a detailed dry run step-by-step
✔ Executed the program and verified the output
🎓 What You’ll Learn in This Video
• Understanding Armstrong number concept
• Counting number of digits
• Extracting digits from a number
• Using power logic inside loop
• Using accumulator variable (sum)
• Applying while loop effectively
• Performing detailed dry run
🧠 Program: Check Armstrong Number
Example:
Input: 153
Digits → 1, 5, 3
Number of digits = 3
Calculation:
1³ + 5³ + 3³ = 1 + 125 + 27 = 153
Output:
Armstrong Number
Logic
✔ Accept a number from the user
✔ Store original number
✔ Count total digits of the number
✔ Initialize sum = 0
✔ Use while loop to process each digit:
• Extract digit using %
• Calculate digit^count
• Add to sum
• Remove digit using //
✔ Compare sum with original number
✔ If equal → Armstrong number
✔ Else → Not an Armstrong number
🧠 Key Learning Point
Armstrong number program combines multiple concepts:
✔ Digit counting
✔ Digit extraction
✔ Power calculation
✔ Loop control
✔ Conditional checking
👉 This program is a perfect example of applying multiple logics in one solution.
🎯 Why This Video Is Important
This program helps students:
• Strengthen logical thinking
• Combine multiple programming concepts
• Prepare for exam and interview questions
• Build confidence in solving complex number problems
Armstrong number is one of the most commonly asked questions in programming.
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