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); |
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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); |
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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); |
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