JavaScript concat() method is used to join two or more strings together without changing the original strings and returning a new string.
Syntax:
str.concat(string2, string3, string4,......, stringN)
Arguments: The arguments to this function are the strings that need to be joined together. The number of arguments to this function is equal to the number of strings to be joined together.
Return value: This function returns a new string that is the combination of all the different strings passed to it as the argument.
Below is an example of the concat() Method.
Example 1: In this example. we will merge Strings using concat() Method.
JavaScript
// JavaScript concat() method to // merge strings together function func() { // Original string let str = 'Geeks'; // Joining the strings together let value = str.concat(' for', ' Geeks'); console.log(value); } func(); |
Output:
Geeks for Geeks
Example 2: In this example. we will merge Strings using concat() Method.
JavaScript
// JavaScript concat() method to // merge strings together function func() { // Original string let str = 'It'; // Joining the strings together let value = str.concat(' is', ' a', ' great', ' day.'); console.log(value); } func(); |
Output:
It is a great day.
The concat() function can also be used to concat strings stored in two or more variables. Also, spaces can also be added to the strings using the concat() function.
Example 3: In this example, we will see the concatenation of two strings stored in different variables also we will see how to include spaces between the strings.
Javascript
let str1 = 'Geeks'let str2 = 'For'let str3 = 'Geeks' // Concating all the strings together without spaces let result1 = str1.concat(str2, str3) console.log('Result without spaces: ' + result1) // Concating all the strings together with spaces let result2 = str1.concat(' ', str2, ' ', str3) console.log('Result with spaces: ' + result2) |
Output:
Result without spaces: GeeksForGeeks Result with spaces: Geeks For Geeks
We have a complete list of Javascript string methods, to check those please go through this Javascript String Complete reference article.
Supported Browsers:
- Chrome 1 and above
- Edge 12 and above
- Firefox 1 and above
- Internet Explorer 4 and above
- Opera 4 and above
- Safari 1 and above
