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1. Count Digits in a Number2. Reverse a Number3. Check Palindrome Number4. Sum of Digits5. Armstrong Number Check6. Perfect Number Check7. Print Primes Between 1-1008. Check if Number is Prime9. Fibonacci Series Up to N10. Sum of First N Fibonacci Terms11. Product of Digits12. Strong Number Check13. Harshad Number Check14. Abundant Number Check

Count Digits in a Number

Count digits in a number.

IntermediatePhase 2 - Level 2: Number-based Looping LogicExample 1 of 14
count-digits-in-a-number.py
1# Take number
2num = int(input("Enter a number: "))
3

4# Count digits
5count = 0
6temp = abs(num)
7

8if temp == 0:
9    count = 1
10else:
11    while temp > 0:
12        count += 1
13        temp //= 10
14

15print(f"Number of digits: {count}")

Output

Enter a number: 12345
Number of digits: 5

Enter a number: 0
Number of digits: 1

What's going on

Repeatedly divide by 10 to remove digits.

Key Concepts:

Divide by 10 (integer division) to remove last digit
Count iterations until number becomes 0
Handle special case of 0

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