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1. Count Digits in a Number 2. Reverse a Number 3. Check Palindrome Number 4. Sum of Digits 5. Armstrong Number Check 6. Perfect Number Check 7. Print Primes Between 1-100 8. Check if Number is Prime 9. Fibonacci Series Up to N 10. Sum of First N Fibonacci Terms 11. Product of Digits 12. Strong Number Check 13. Harshad Number Check 14. Abundant Number Check

Sum of Digits

Calculate sum of digits of a number.

IntermediatePhase 2 - Level 2: Number-based Looping LogicExample 4 of 14

sum-of-digits.py

1# Take number
2num = int(input("Enter a number: "))
3
4# Sum of digits
5digit_sum = 0
6temp = abs(num)
7
8while temp > 0:
9    digit = temp % 10
10    digit_sum += digit
11    temp //= 10
12
13print(f"Sum of digits: {digit_sum}")

Output

Enter a number: 1234
Sum of digits: 10

What's going on

Extract digits and add them.

Key Concepts:

Extract last digit using modulo

Add to sum

Remove last digit using integer division

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