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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

Sum of All Even Numbers Up to N

Print the sum of all even numbers up to n.

BeginnerPhase 2 - Level 1: Basic LoopingExample 8 of 14
sum-of-all-even-numbers-up-to-n.py
1# Take n as input
2n = int(input("Enter n: "))
3

4# Calculate sum of even numbers
5sum_even = 0
6for i in range(2, n + 1, 2):
7    sum_even += i
8

9print(f"Sum of even numbers up to {n}: {sum_even}")

Output

Enter n: 10
Sum of even numbers up to 10: 30

What's going on

Sum only even numbers using step 2.

Key Concepts:

Start from 2 (first even number)
Step by 2 to get only even numbers
Accumulate sum

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