How to Concatenate Strings in JavaScript ?

In this article, we will see different methods to Concatenate Strings in JavaScript. The concat means joining two or more strings and returning a new string.

Approaches to Concate String in JavaScript:

• Using String concat() Method
• Using + Operator
• Using Array join() Method

Method 1: Using String concat() Method

The concat() method is used to join two or more strings without changing the original strings and returning a new string.

Syntax:

str1.concat( str2, str3, . . . , strN )

Example: In this example, we will concat the given string using the strings concat() method.

Javascript

// JavaScript concat() method to
// merge strings together

// Original string
let str = 'Geeks';

// Joining the strings together
let value = str.concat('for', 'Geeks');

console.log(value);

Output

GeeksforGeeks

Method 2: Using JavaScript + Operator

The + operator adds strings and returns the concatenated string. It is the easiest method for the concatenation of two strings.

Syntax:

let str = str1 + str2

Example: In this example, we will concate two string using + operator.

Javascript

// JavaScript + Operator to
// Merge Strings

// Original string
let str1 = 'Geeks';
let str2 = 'for';
let str3 = 'Geeks';

// Joining the strings together
let str = str1 + str2 + str3;

console.log(str);

Output

GeeksforGeeks

Method 3: Using JavaScript Array join() Method

The JavaScript Array join() Method is used to join the elements of an array into a string. The elements of the string will be separated by a specified separator and its default value is a comma ( , ).

Syntax:

array.join( separator )

Example: In this article we will concate strings present in an array.

Javascript

// JavaScript program to join Strings
// using array join() method
let arr = ['Geeks', 'for', 'Geeks'];

// Joining the strings using
// join() method
let str = arr.join('');

console.log(str);

Output

GeeksforGeeks