How to get the Index of Specified Element in an Array in C# - Step by Step Examples

How to get the Index of Specified Element in an Array in C# ?

Answer

To get the index of a specified element in an array in C#, you can use the Array.IndexOf method.


✐ Examples

1 Index of Element 30 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We use the Array.IndexOf method to find the index of 30 in the array.
  3. If the element is found, we print its index.
  4. If the element is not found, we print a message indicating it's not in the array.

C# Program

using System;

class Program
{
    static void Main()
    {
        int[] arr = { 10, 20, 30, 40, 50 };
        int specifiedElement = 30;

        int index = Array.IndexOf(arr, specifiedElement);
        if (index != -1)
        {
            Console.WriteLine("Index of specified element " + specifiedElement + " is: " + index);
        }
        else
        {
            Console.WriteLine("Specified element not found in the array");
        }
    }
}

Output

Index of specified element 30 is: 2

2 Index of Element 60 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We use the Array.IndexOf method to find the index of 60 in the array.
  3. If the element is found, we print its index.
  4. If the element is not found, we print a message indicating it's not in the array.

C# Program

using System;

class Program
{
    static void Main()
    {
        int[] arr = { 10, 20, 30, 40, 50 };
        int specifiedElement = 60;

        int index = Array.IndexOf(arr, specifiedElement);
        if (index != -1)
        {
            Console.WriteLine("Index of specified element " + specifiedElement + " is: " + index);
        }
        else
        {
            Console.WriteLine("Specified element not found in the array");
        }
    }
}

Output

Specified element not found in the array

Summary

In this tutorial, we learned How to get the Index of Specified Element in an Array in C# language with well detailed examples.


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