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.