I want to know the sum of every whole number from 1 up to
whatever number I give you, without doing the addition
myself.
Write your requirements list before you write any code. Input, calculate, output, and anything you had to decide for yourself.
Notes
The number of passes is exactly the number typed in. That is a for, the same shape as Times Table in this set.
This one keeps a running total across every pass, which Times Table did not need. The total has to exist before the loop starts, at 0.
“Up to whatever number I give you” means that number is included. Check your loop's condition against that.
Print the total once, after the loop ends — not once per pass.
Where to Start
Only one-star challenges have this section. If you already know how to begin, skip it — and when you move up to two stars, working out the order yourself is part of the job.
Read the number and parse it with int.Parse.
Declare a total, starting at 0, before the loop.
Write a for loop from 1 up to and including that number, adding each pass's value to the total.
Print the total after the loop. Test with 10 — you know the answer is 55.
Sample Output
Sample Output
Add up to what number? 10
Sum: 55
Verified in a real run — 1 through 10 sums to exactly 55.
Submit
Your requirements list and your program file, named cc-add-it-up.
