A JavaScript data type that represents the exact text of whatever is enclosed in the quotes

An operator is a special character (or characters) that indicates an action to be performed.
+, -, *, /, and % are called operators.

Variables are one of the major features of computer programming and we will use them all the time when we are coding. A variable is just a container that stores some information such as a number, an object, or a string.

A method is an action run on a piece of data; you can think of it as a message you send to a piece of data, and the result is the response.

Booleans can only hold 2 possible values - true or false.

The undefined data type has only one possible value - undefined. When declaring a variable without giving it a value, JavaScript creates the variable without a value, hence undefined.

Stands for "not a number, but it is considered a number.

The value null represents the intentional absence of any object value.

An argument is the value that is passed into a parameter. We often pass variables into parameters as arguments. We can also pass other data types into parameters as well, but it's much more common to pass in variables.

A parameter is a placeholder for an argument. We use parameters when we declare functions and methods.

The return statement stops the execution of a function and returns a value from that function.

JavaScript is a programming language used to make web pages interactive. Like HTML and CSS, you do not need to install anything to begin writing JavaScript or see it run on your users' computers.