How to combine two strings in JavaScript

Today, we’ll explain to you how to combine two strings in JavaScript.

We can assign a string to a variable and combine the variable with another string. Here, we will show you the different ways to join two or more strings in JavaScript.

Suppose, we have a first name and last name and want to join both names so we can join two strings and create a full name using JavaScript.

Different ways to concatenate strings in JavaScript

Using + operator
Template string
concat() method
join() method

1. Using + operator

We can use the + operator to create a new string or change the existing string by adding it.

const firstname = 'Clue';
const lastname = 'Mediator';
const fullname = firstname + ' ' + lastname;
console.log(fullname);
// Output: Clue Mediator

In the above code, we have combined the strings which is assigned to the variable. Now, we will join the variable to another string.

const firstname = 'Clue';
const lastname = 'Mediator';
const newStr = 'Welcome to ' + firstname + ' ' + lastname + '!';
console.log(newStr);
// Output: Welcome to Clue Mediator!

Also, append the variable to an existing string using += as shown below.

const firstname = 'Clue';
const lastname = 'Mediator';
let newStr = 'Welcome to our website';
newStr += ' ' + firstname + lastname;
console.log(newStr);
// Output: Welcome to our website ClueMediator

2. Template string

It's a common issue to missing space when concatenating strings using + operator. In JavaScript, you can add interpolate variables into string using template string as shown below.

const firstname = 'Clue';
const lastname = 'Mediator';
let newStr = `Welcome to our website ${firstname} ${lastname}.`;
console.log(newStr);
// Output: Welcome to our website Clue Mediator!

3. concat() method

Using Javascript built-in `concat()` method, we can join two or more strings.

The concat() method does not change the existing strings and returns a new string that results from concatenates the string arguments to the original string.

Syntax

string.concat(str1, str2, ... strN);

Example

const str = 'Welcome';
const result = str.concat(' to',' our',' website', ' cluemediator.com');
console.log(result);
// Output: Welcome to our website cluemediator.com

4. join() method

At last, the `join()` method concatenates all elements of the array and return a string. The `join()` method accepts an optional parameter called separator that separates the elements of the string. The default separator value is comma (`,`).