C# program to check if a value is in an array

Use the Array.Exists method to check if a value is in an array or not.

Set a string array −

string[] strArray = new string[] {"keyboard", "screen", "mouse", "charger" };

Let’s say you need to find the value “keyboard” in the array. For that, use Array.Exists() −

Array.Exists(strArray, ele => ele == "keyboard");

It returns a true value if element exists as shown below −

Example

 Live Demo

using System; using System.Text; public class Demo {    public static void Main() {       string[] strArray = new string[] {"keyboard", "screen", "mouse", "charger" };       bool res1 = Array.Exists(strArray, ele => ele == "harddisk");       Console.WriteLine(res1);       bool res2 = Array.Exists(strArray, ele => ele == "keyboard");       Console.WriteLine(res2);    } }

Output

False True