The addition assignment ( += ) operator performs addition (which is either numeric addition or string concatenation) on the two operands and assigns the result to the left operand.

If Statement The code block will be ignored in the case of a false result, and the program will skip to the next section. An if statement is written with the if keyword, followed by a condition in parentheses, with the code to be executed in between curly brackets. In short, it can be written as if () {} .

JavaScript provides 3 places to put the JavaScript code: within body tag, within head tag and external JavaScript file. Let's create the first JavaScript example. The script tag specifies that we are using JavaScript. The text/javascript is the content type that provides information to the browser about the data.