# PXFISCONST

POSIX Function: Tests whether a string is a valid constant name.

## Module

USE IFPOSIX

result = PXFISCONST (s)

s | (Input) Character. The name of the constant to test.

## Results

The result type is logical. The PXFISCONST function confirms whether the argument is a valid constant name that can be passed to functions PXFCONST and IPXFCONST. It returns .TRUE. only if IPXFCONST will return a valid value for name s.

Parent topic: POSIX* Library Routines

## See Also

IPXFCONST
PXFCONST