Why is the result of a subtraction of an Int16 parameter from an Int16 variable an Int32?
.net, c#, variables
Solution
It's not just subtraction, there simply exisits no short (or byte/sbyte) arithmetic.
short a = 2, b = 3;
short c = a + b;
Will give the error that it cannot convert int (a+b) to short (c).
One more reason to almost never use short.
Additional: in any calculation, short and sbyte will always be 'widened' to int, ushort and byte to uint. This behavior goes back to K&R C (and probaly is even older than that).
The (old) reason for this was, afaik, efficiency and overflow problems when dealing with char. That last reason doesn't hold so strong for C# anymore, where a char is 16 bits and not implicitly convertable to int. But it is very fortunate that C# numerical expressions remain compatible with C and C++ to a very high degree.
Problem
Possible Duplicate: byte + byte = int… why? I have a method like this: ``` void Method(short parameter) { short localVariable = 0; var result = localVariable - parameter; } ``` Why is the result an `Int32` instead of an `Int16`?