C # method variable number of parameters _c# tutorial

Declare a variable number of parameters:

Copy Code code as follows:

Static int Add (params int[] values)
{
int sum = 0;
if (value!= null)
{
for (int x = 0;x<values. length;x++)
Sum + + values[x];
}
return sum;
}

The above method, which removes params, is a common method that takes an int array and returns the sum of the items in the group.

We can call this: Add (new int[]{1,2,3});

But reading is not very high, we want to be more concise:

ADD (1,2,3);

At this point, because the params keyword, can be compiled through and run.

Params can only be applied to the last one in a method parameter.

When the C # compiler discovers Add (1,2,3), it first looks for a way to match the add (int i,int j,int k).
If there is a call, no, find out if there is a method defined as add (params int[] values),

If so, save 1, 2, and 3 to an array, and then call the Add (int[] values) method.
It also shows that the CLR is ignorant of the params keyword, and params is only available to the C # compiler.