What is Lamda Operator? Explain with code.

Answer:

Lamda expression are concise way to represent an anonymous method that we can use to create delegates or expression tree types. Lambda expression is an inline delegate introduced with C # 3.0 language.

 static void Main(string[] args)

        {

                    #region Using Lamda

            int[] Marks = { 100,54,35,98,62,85,49 };



         

            var FailMarks = Marks.Where(Fail => Fail < 50);



            foreach (int failMarks in FailMarks)

                Console.WriteLine(string.Format("Fail Marks are using LAMDA {0}", failMarks));

            #endregion





            #region Using Delegate

            var delegateFail = Marks.Where(delegate(int x) 

                        {

                            return (x < 50);

                        })

                .ToList();





            foreach (int failMarks in delegateFail)

                Console.WriteLine(string.Format("Fail Marks are using DELEGATES {0}", failMarks));

            #endregion

}

In the above code I am having integer array of marks ranging from 1-100. I need to print the marks which are lesser then 50 that is Fail. In first part I achieved using Lamda operator by a condition less then 50. In second part I created an anonymous delegate and checking the conditon.

The output will be

Fail Marks are using LAMDA 35

Fail Marks are using LAMDA 49

Fail Marks are using DELEGATES 35

Fail Marks are using DELEGATES 49