indexof with the arrays

Let us consider an array having name arr of string type.
 

string[] arr = new string[5]{"Bhavesh","Sachin","Sundar","Sparsh","Ritesh"};

Console.WriteLine(Array.IndexOf(arr,"Bhavesh"));
 //output:0

Console.WriteLine(Array.IndexOf(arr,"Sachin"));
 //output:1

Console.WriteLine(Array.IndexOf(arr,"Sundar"));
 //output:2

Console.WriteLine(Array.IndexOf(arr,"Sparsh"));
 //output:3

Console.WriteLine(Array.IndexOf(arr,"Ritesh"));
 //output:4

Starting the search from a specific index:

const colors = ["red", "green", "blue", "yellow"];
const yellowIndex = colors.indexOf("yellow", 2); // Start search from index 2

console.log(yellowIndex); // Output: 3 (index of "yellow")

Finding the index of a specific element:
 

const fruits = ["apple", "banana", "orange", "banana"];
const bananaIndex = fruits.indexOf("banana");

console.log(bananaIndex); // Output: 1 (index of the first "banana")

thanks all for your help 

omran abuzaid

The indexOf() method returns the first index (position) of a specified value.The indexOf() method returns -1 if the value is not found.The indexOf() method starts at a specified index and searches from left to right.By default the search starts at the first element and ends at the last.Negative start values counts from the last element (but still searches from left to right).

 Example:
const fruits = ["Banana", "Orange", "Apple", "Mango", "Apple"];  
let index = fruits.indexOf("Apple", -1);