Adding a negative int to a byte value?

Asked Jul 30 '19 at 18:15

Active Jul 30 '19 at 18:15

Viewed 29 times

I know this is a pretty simpleton question, and I have tried google first, but I'm currently stumped here. I'm clearly missing something obvious.

How do you subtract a negative integer from a byte value?

//Code simplified greatly for simple simplicity :)
byte BaseValue = 10;
int Modifer = -2;

BaseValue += Modifer; //Should end up with BaseValue = 8

I've tried declaring Modifer has a byte (can't have negatives), I've tried declaring it as a sbyte (can't cast sbyte to byte).

In this case 8 is still a valid value for a byte type so not sure why I can't subtract from it.

How do you actually do what I'm trying to do? Again, this strikes me as a dirt simple mistake but I can't seem to figure out what's going on here.

thanks

asked Jul 30 '19 at 18:15

Canuck Play

Have you tried using casting and `-` operation? – Samvel Petrosov Jul 30 '19 at 18:20
If this is a duplicate, point me to the duplicate. Don't just mark it as duplicate without any other information. – Canuck Play Jul 30 '19 at 18:21
Samvel Petrosov I'm not sure I understand what you mean. thanks – Canuck Play Jul 30 '19 at 18:22
https://dotnetfiddle.net/sjL28W – Samvel Petrosov Jul 30 '19 at 18:23
Great... yes thanks. that works. Thanks for your help. – Canuck Play Jul 30 '19 at 18:25
please read the question and answers mentioned by @JonSkeet, there are a lot of things to think before trying to do arithmetical operations with bytes. – Samvel Petrosov Jul 30 '19 at 18:30
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*Every* time a question is closed as a duplicate, there's *always* a link to the duplicate at the top. It's impossible (as far as I'm aware) to close it as a duplicate without the duplicate itself being linked. – Jon Skeet Jul 30 '19 at 18:34

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