> For the complete documentation index, see [llms.txt](https://eleven-fifty-academy.gitbook.io/javascript-152-objects-arrays/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eleven-fifty-academy.gitbook.io/javascript-152-objects-arrays/05-arrays/array-methods/.indexof-method.md).

# .indexOf() Method

The `.indexOf()` method can be used to determine where an element is located in the array. Duplicates give the index of the first instance. Let's use the letters of the alphabet and figure out what letter **q** is.

```javascript
var alphabet = "a b c d e f g h i j k l m n o p q r s t u v w x y z";

var alphaQ = alphabet.split(" ").indexOf("q");

alphaQ += 1;
console.log(alphaQ);
```

You should have gotten **17**. Let's break this down:

* I put the `.split()` and `.indexOf` methods together to show you that you can combine methods, and also just to save time and space.
* I added one to `alphaQ` before logging it to the console because arrays are **zero-indexed**.