Minix Man Pages
home | helpISINFF(3) BSD 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. BSD August 16, 1999 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | BUGS