Declaring (Creating) JavaScript Variables

Creating variables in JavaScript is most often referred to as “declaring” variables.

You declare JavaScript variables with the var keyword:

var x;
var carname;

After the declaration shown above, the variables are empty (they have no values yet).

However, you can also assign values to the variables when you declare them:

var x=5;
var carname=”Volvo”;

After the execution of the statements above, the variable x will hold the value 5, and carname will hold the value Volvo.

Note: When you assign a text value to a variable, use quotes around the value.

Note: If you redeclare a JavaScript variable, it will not lose its value.