An example of a strictly-typed language is ActionScript (the language Flash apps are written in), and the same variable declaration we just wrote would look like this in ActionScript 3: var ...

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.

Many computer programmers know multiple languages. The range of programming languages is wide, with some languages used in specific contexts, but some more general. For example, Java can implement ...

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.