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Command: isinff | Section: 3 | Source: MINIX | File: isinff.3
ISINFF(3) FreeBSD Library Functions Manual ISINFF(3)
NAME
isinff, isnanf - test for infinity or not-a-number
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
int
isinff(float);
int
isnanf(float);
DESCRIPTION
The isinff() function returns 1 if the number is "infinity", otherwise 0.
The isnanf() function returns 1 if the number is "not-a-number",
otherwise 0.
SEE ALSO
isinf(3), isnan(3), math(3)
IEEE Standard for Binary Floating-Point Arithmetic, Std 754-1985, ANSI.
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.
FreeBSD 14.1-RELEASE-p8 August 16, 1999 FreeBSD 14.1-RELEASE-p8