The **`concat()` method** of the String class in JavaScript concatenates a list of strings to a provided string.

The process is illustrated below:

The prototype of the `concat()` method is shown below:

```Javascript
string.concat(str1, str2, ... , strN);
```
In the command shown above, `string` represents any string object.

<h2>Parameter</h2>

The `concat()` method accepts one or more strings as parameters. There is no limit to the number of strings that can be provided in the parameter list.

<h2>Return value</h2>

The `concat()` method returns the newly created string by concatenating the strings provided as parameters with the string used to invoke the method.

<h2>Example</h2>

The code below shows how the `concat()` method can be used in JavaScript:

// initialize strings
var stringOne = "Learning ";
var stringTwo = "the Javascript String library ";
var stringThree = "with Educative";

// create new concatenated string
var concatString = stringOne.concat(stringTwo, stringThree, "!");

// print string
console.log(concatString);

##
### Explanation

First, three string objects are initialized. A space is left at the end of the strings to allow for separation between the string snippets in the concatenated string.

The `concat()` method in line $7$ takes the argument list and concatenates all the provided strings to `stringOne`. You need to ensure that you provide the space characters between the different strings, since the `concat()` method does *not* add spaces automatically.

>**Note**: You can also use [assignment operators](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators#assignment_operators), e.g., `+` and `+=`, to concatenate strings instead of the `concat()` method.

What is the String concat() method in JavaScript?

Parameter

Return value

Example

Explanation