Pascal is a high-level programming language developed by Niklaus Wirth in 1971 that is named after the Mathematician Blaise Pascal. Below is an example of a Pascal program that prints "Hello World!" to the screen.
program Hello; begin Write('Hello world'); end.
After the above is entered into a file, save it as hello.pas and compile the program before it can run.
What is Free Pascal?
Originally named FPK-Pascal, Free Pascal is a mature, versatile, open source Pascal compiler sometimes called FPC (Free Pascal compiler). The program tries implementing a Borland-compatible Pascal compiler on as many platforms as possible.