Manual Pages for UNIX Operating System command usage for man isinf

Mathematical Library Functions                          isinf(3M)



NAME
     isinf - test for infinity

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     int isinf(real-floating x);


DESCRIPTION
     The isinf() macro determines whether its argument  value  is
     an  infinity  (positive  or  negative).  First,  an argument
     represented in a format wider than its semantic type is con-
     verted  to its semantic type. Then determination is based on
     the type of the argument.

RETURN VALUES
     The isinf() macro returns a non-zero value if  and  only  if
     its argument has an infinite value.

ERRORS
     No errors are defined.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     fpclassify(3M),   isfinite(3M),   isnan(3M),   isnormal(3M),
     math.h(3HEAD), signbit(3M), attributes(5), standards(5)











SunOS 5.11          Last change: 17 Nov 2008                    1