About this guide

This document describes all constants, types, variables, functions and procedures as they are declared in the system unit.

Furthermore, it describes all pascal constructs supported by Free Pascal, and lists all supported data types. It does not, however, give a detailed explanation of the pascal language. The aim is to list which Pascal constructs are supported, and to show where the Free Pascal implementation differs from the Turbo Pascal implementation.

Throughout this document, we will refer to functions, types and variables with typewriter font. Functions and procedures gave their own subsections, and for each function or procedure we have the following topics:

Declaration

The exact declaration of the function.

Description

What does the procedure exactly do ?

Errors

What errors can occur.

See Also

Cross references to other related functions/commands.

• References to other functions in this manual. In the printed copy, a number will appear after this reference. It refers to the page where this function is explained. In the on-line help pages, this is a hyperlink, on which you can click to jump to the declaration.
• References to Unix manual pages. (For linux related things only) they are printed in typewriter font, and the number after it is the Unix manual section.