NAME
isinff,
isnanf
- test for infinity or not-a-number
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
int
isinff(float)
int
isnanf(float)
DESCRIPTION
The
isinff()
function
returns 1 if the number is
``'',
otherwise 0.
The
isnanf()
function
returns 1 if the number is
``not-a-number'',
otherwise 0.
SEE ALSO
isinf(3),
isnan(3),
math(3)
BUGS
Neither the
VAX
nor the Tahoe floating point have distinguished values
for either infinity or not-a-number.
These routines always return 0 on those architectures.