Lambda expression for multiple parameters

Question

I understand a lambda expression is in essence an inline delegate declaration to prevent the extra step

example

delegate int Square(int x)
public class          


        

Answer 1

You must understand the Func behavior, where the last parameter is always the output or result

Func<1, 2, outPut>

Func<int, int, int> Add = (x, y) => x + y;

Func<int, int, int> diff = (x, y) => x - y;

Func<int, int, int> multi = (x, y) => x * y;

Answer 2

Yes. When you have other-than-one (zero, or > 1) lambda arguments, use parenthesis around them.

Examples

Func<int, int, int> add = (a,b) => a + b;

int result = add(1, 3);

Func<int> constant = () => 42;

var life = constant();

Answer 3

delegate int Multiplication(int x, int y)
public class Program
{
   static void Main(String[] args)
   {
      Multiplication s = (o,p)=>o*p;
      int result = s(5,2);
      Console.WriteLine(result); // gives 10
   }
}