LAMBDA
Expression Part 1
A
lambda expression is an anonymous function. Using lambda expression we can
create function for delegate and we can also create expression tree type.
Syntax of Lambda Expression
Input
parameter=>programming statements
Lambda Expression Example with
Delegate
If
you know how to use delegate then you know we have to pass the reference of
method to that delegate which matches the signature. But when we use lambda
expression we can give the definition of that method directly to the delegate
which is as follows:-
using System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
//create a delegate which take one int as input and return
one int
public delegate int Del_example(int x);
public partial class Default2 : System.Web.UI.Page
{
protected void
Page_Load(object sender, EventArgs e)
{
//create object of delegate and instead passing the
ref of method i simply pass
//the complete definition using lambda expression
Del_example cal_square = x => x * x;
//execute the delgate
int
res=cal_square(5);
Response.Write(res);
}
}
