C# Method Overloading - Why interger method gets called first? Why not double?

Question

I am trying to understand a basic thing regarding Method Overloading

If a class has two methods overloaded like below:

Add(int a,int b);

and

Add(double i, double y);

And in Main method if I call the method like below:

Add(2, 3);

Then always the method with integer parameters gets called Add(int a,int b)

Why didn't it call the other method Add(double i, double y)? As double type can also hold values 2, 3 passed from the main method call.

Answer 1

Because 2 and 3 have type int, so the overload that has int arguments fits ideally. If you want to have overload with double arguments called, you have to pass doubles or floats.

Answer 2

因为编译器会使用更接近你调用的参数来调用方法。如果你调用add（2,3），两个参数都是整数，它会为你调用add（int，int）。 For more details, read this tutorial.