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iOS

Janson Roberts
Janson Roberts
5,071 Points
Posted by Janson Roberts
Janson Roberts
5,071 Points

Difference in using certain operators (++,--,+=)

If I were to take a for loop and start with a value of (int i = 5; i <= 25; i++){ mathTotal += i; }

Could someone explain what the operand is (+=) and how it differs from ++ or x = x + y?

3 Answers

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

The ++ and -- operators only increment/decrement by 1. += is short-hand for x = x + y. It would be used if you want to increment by 2, for example.

Janson Roberts
Janson Roberts
5,071 Points
Janson Roberts
Janson Roberts
5,071 Points

It's for Obj-C. That's nice to know for Swift. My thinking is that it's just a simplified way to write x = x + y...is that correct?

Janson Roberts
Janson Roberts
5,071 Points
Janson Roberts
Janson Roberts
5,071 Points

Thanks, Caleb.

So, if I wanted to increment or decrement by 2 or more, then I'd have to write (x += 2)? Just wanting to get a better understanding of the operators used to increment/decrement. The ++ and -- TOTALLY make perfect sense. I'm just trying to wrap my head around the += or -= operators. =)