This documentation describes various Natural "built-in" functions for use in certain statements; see System Functions in the Programming Guide.

This documentation is organized under the following headings:

System Functions for Use in Processing Loops | Describes Natural system functions which can be used in a program loop context. |

Mathematical System Functions | Describes the system functions which are supported in arithmetic processing statements and in logical condition criteria. |

Miscellaneous System Functions | System functions to evaluate the minimum or maximum; system function for field identification; system function to receive the return code from a non-Natural program; system function to convert "incorrectly sorted" characters; system function for lower/upper case translation; system function to remove leading and/or trailing blanks. |

Functions Supplied as Natural Objects | Describes functions which are supplied as Natural objects to support, for example, URL encoding and Base64 conversion. |

See also Example of System Variables and System Functions in the Programming Guide.

**Note:**

The individual mathematical system functions and the
functions supplied as Natural objects are not included in the Quick
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