# Language Elements

Primary Syntax Elements |

The PxPlus language uses a standard set of keywords and symbols to deliver instructions in a statement, as well as to create/execute programs. Some of these are required to make statements executable, while others are used to further define the tasks and the data in the operation being performed.

#### Note:
PxPlus keywords are reserved for internal use by the system - they should never be used as variable names in applications.

The primary elements in the PxPlus language are grouped as follows:

Element | Description
Directives | Commands that tell the system what task is to be performed.
System Functions | Numeric or string operations that process values and yield results within a program statement.
System Variables | Internally-defined numeric and string variables for providing system information, such as the date and time.
Mnemonics | Special control sequences for output to a display device or printer.
System Parameters | Options for controlling a system's operation under PxPlus.
Control Object Properties | Named attributes for modifying graphical user interface control objects.

## See Also

PxPlus Language Reference
Punctuation/Syntax
Programming Constructs
Data Types, Literals and Variables