LastOrDefault

In this chapter you will learn:

How to use LastOrDefault operator

Get to know LastOrDefault operator

using System;//  java 2  s  .c o m
using System.Linq;

public class MainClass{
   public static void Main(){
      int[] numbers = { 1, 3, 5, 7, 9 };
      var query = numbers.LastOrDefault(n => n % 2 == 1);
      Console.Write(query);
   }
}

The following code shows how to use LastOrDefault method to filter string value.

using System;/* j  a  v  a  2 s . c o m*/
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"G", "H", "a", "H", "over", "Jack"};

        string name = presidents.LastOrDefault(p => p.StartsWith("Z"));
        Console.WriteLine(name == null ? "NULL" : name);

    }
}

We can also use LastOrDefault without parameters.

using System;//  j a  v a  2s.  co m
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
        string name = presidents.Take(0).LastOrDefault();
        Console.WriteLine(name == null ? "NULL" : name);
    }
}

Next chapter...

What you will learn in the next chapter: