Appendix C. Functions
This appendix provides a reference to all Rexx functions, as defined by the ANSI-1996 standard. It also points out the important differences between the ANSI-1996 standard and the earlier standard defined by TRL-2. As this appendix is intended as a quick reference guide for developers, please see the full ANSI-1996 and TRL-2 standards if more detailed information is required. Appendix A tells where to obtain the two standards.
Each entry is identified by the name of the function. Entries contain a template of the function, showing its arguments, if any. Optional arguments are enclosed in brackets ([ ]). The template is followed by a description of the function and its use, the function's arguments, and possible return codes. Coding examples show how to code each function.
ABBREV(information, info [,length])
Returns 1 if
info is equal to the leading characters of
info is not less than the minimum
length. Otherwise returns 0. If not specified,
length defaults to the length of
abbrev('Hello','He') == 1 abbrev('Hello','Hi') == 0 abbrev('Hello','Hi',3) == 0 /* INFO does not meet minimum LENGTH. */
Returns the absolute value of
number, formatted according to the current setting of
numeric digits and without a leading sign.
abs(−0.47) == 0.47 abs(0) == 0
Returns the name of the environment to which commands are currently directed.
The ANSI-1996 standard allows a new format for this function that specifies ...