Question

I’m a newbie to C# and .NET, so I apoligize if this is a too simple question.

I have a decimal variable decVar.
I need to multiply it with an integer variable intVar.
I need the result to be decimal.
So should I then declare the integer variable as int or as decimal?

Having this code,

decimal decVar = 0.1m;
decimal decRes = decVar * intVar;

should I declare it like this:

int intVar = 3;

or like this:

decimal intVar = 3;

?

This is a financial calculation, so I need the result to be exactly 0.3.

upd : Code updated (thanks to Jon)

Answer 1

It doesn’t matter – the int will be converted to decimal anyway: there isn’t a *(decimal, int) operator, just *(int, int) and *(decimal, decimal). (And other types, of course.)

Now decimal can’t be implicitly converted to int, but the reverse conversion is valid – so that’s what the compiler does.

However, you’ll need to change the declaration of decVar as currently the right hand side of the assignment operator is a double, not a decimal. You mean 0.1m. You’ll want semi-colons too 🙂