Numeric functions perform calculations on numeric constants
and fields.
For many functions, the output argument can be
supplied either as a field name or as a format enclosed in single
quotation marks. However, if a function is called from a Dialogue Manager
command, this argument must always be supplied as a format, and
if a function is called from a Maintain Data procedure, this argument
must always be supplied as a field name. For detailed information
about calling a function and supplying arguments, see Accessing and Calling a
Function.
Note: With CDN ON, numeric arguments must be delimited
by a comma followed by a space.