For example, a variable can be used in the program that controls an automatic car park barrier. It can keep track of the number of cars going in and out and decide whether to let more cars in.

Of course, the answer is n = 2. This is how variables work in programming. A variable is a label (usually a word) that can be substituted for a piece of data. This then allows us to ferry ...

Here are more tips to keep in mind when naming your variables: Unlike some other programming languages, JavaScript does not require you to explicitly define the type of variable you want to create.

The most popular ‘Path’ variable is the one that points to the directories containing executable files. So that you can run a program from the Command Prompt in any other directory.