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- Categories: JavaScript Methods, JavaScript Reference, Reference
Last Updated on November 19, 2022
Quick Reference
The String concat() method joins two or more strings, returning a new string, without changing the existing strings.
<!-- html element to place output -->
<p id="my_output"></p>
Example 1
// variables
let text_1 = 'Hello';
let text_2 = 'World';
let my_string = text_1.concat(text_2);
// output to the HTML element
document.getElementById('my_output').innerHTML = my_string;
Example 2
// variables
let text_1 = 'Hello';
let text_2 = 'World';
let text_3 = '!';
let my_string = text_1.concat(' ', text_2, ' ', text_3);
// output to the HTML element
document.getElementById('my_output').innerHTML = my_string;
Output
Example 1
HelloWorld
Example 2
Hello World !
Syntax
string.concat(string_1, string_2, ..., etc.)
string.concat(separater, string_1, separater, string_2, separater, ..., etc.)
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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