Lesson 16 — Putting it together
Putting it together
Real programs combine everything: a function to organise the logic, a loop to go through numbers, and an if to pick the ones you want.
Why it matters: breaking a task into these building blocks is exactly how experienced developers solve big problems — one small piece at a time.
Tip: the % (modulo) operator gives the remainder, so i % 2 == 0 is true only for even numbers.
Write a function that returns the sum of even numbers from 1 to n. Print it for n=10.
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