Karl Gjertsen

Architect, Developer, Speaker, Bad Golfer,
Raygun brand ambassador and creator of Infiniforms

C#: Adding Shorts

Have you ever tried adding 2 shorts together?

Did you know that a = a + b and a += b are different? I didn’t!

A short is an alias of Int16, or a number that fits into 16 bits. This is half the size of an integer, which is an alias for Int32.

short.MinValue = -32768
short.MaxValue = 32767

As a simple example, I want to add two shorts with values of 1 & 2 and assign it into a third short. But…The example below won’t compile!

short value1 = 1;
short value2 = 2;

short value3 = value1 + value2;

Why? Because adding two shorts returns an integer, not a short. Adding 2 integers together is valid, but not 2 shorts.

Ok, so what if we add the 2 shorts and then cast the integer to a short, like this:

short answer = 0;
short value1 = 1;
short value2 = 2;

answer = (short) value1 + value2;

Nope, that won’t compile either. So how can you add 2 shorts?

It turns out that you can add them like this:

short value1 = 1;
short value2 = 2;

value1 += value2;

I don’t know why this is the case, but it is a quirk of the way the C# language works.

 

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