JavaScript Reference

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.)

// or

string.concat(separater, string_1, separater, string_2, separater, ..., etc.)

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)

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.