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1. Print Numbers from 1 to 102. Print All Even Numbers Between 1 and 1003. Sum of First N Natural Numbers4. Print the Factorial of a Given Number5. Print All Odd Numbers Between 1 and 1006. Print Numbers from 10 Down to 17. Print Multiplication Table8. Sum of All Even Numbers Up to N9. Sum of All Odd Numbers Up to N10. Product of Digits11. Count Numbers Divisible by 312. Print Multiples of 5 Up to N13. Sum of Squares Up to N14. Print Alternating Numbers

Count Numbers Divisible by 3

Count numbers from 1 to n that are divisible by 3.

BeginnerPhase 2 - Level 1: Basic LoopingExample 11 of 14
count-numbers-divisible-by-3.py
1# Take n as input
2n = int(input("Enter n: "))
3

4# Count divisible by 3
5count = 0
6for i in range(1, n + 1):
7    if i % 3 == 0:
8        count += 1
9

10print(f"Numbers divisible by 3: {count}")

Output

Enter n: 20
Numbers divisible by 3: 6

What's going on

Check each number for divisibility by 3.

Key Concepts:

Loop from 1 to n
Check if divisible by 3 using modulo
Count matches

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