A JavaScript array is created using square brackets '' or using the 'new Array()' constructor.

What is an array in JavaScript?Īn array is a special built-in object in JavaScript that allows storing multiple elements of different types in a single variable. JavaScript can also be used on the server side ( Node.js), making it a universal language for all devices and platforms. An example of how to use this method in JavaScript has been provided above with expected outputs displayed on the console.JavaScript is a client-side programming language that runs in the web browser, allowing for real-time manipulation and updates of content on a web page. It accepts two arguments: searchElement and fromIndex (optional). The `()` method is a useful tool for determining whether an array contains a certain value among its entries, returning either true or false depending on the search result. We subsequently check for the value `6` which is not present in the array, hence the output on the console will display `false`. Since the value `3` is present in the array, the output on the console will display `true`. We then use the `.includes()` method to check whether the value `3` is present in the array.

In the example above, we create an array called `numbers` which contains the values `1`, `2`, `3`, `4`, and `5`. Here’s an example of how to use the `.includes()` method in JavaScript:Ĭonsole.log(numbers.includes(3)) // Output: trueĬonsole.log(numbers.includes(6)) // Output: false If not specified, the search starts from index 0. fromIndex (Optional) – the position in the array from where to start the search. searchElement – the element to search for in the array.Ģ. The `()` method is used to determine whether an array includes a certain value among its entries, returning a Boolean value depending on the search.ġ.

In this blog post, we will discuss how to use this powerful JavaScript tool and provide examples of it in action. This method allows you to determine whether an array includes a certain value among its entries, returning either true or false depending on the search result. Are you looking for a way to check if an array contains a certain value? The `()` method is the perfect solution.

Javascript array includes