[Solved] Trouble adding and subtracting number from range [closed]

Question

Don’t use any tricks in looping through your range. Just maintain a variable that tells you whether you should be adding this time, or subtracting, and alternate that variable with each pass through your loop.

Accepted Answer

Don’t use any tricks in looping through your range. Just maintain a variable that tells you whether you should be adding this time, or subtracting, and alternate that variable with each pass through your loop.