Mathematical Library Functions                       isfinite(3M)



NAME
     isfinite - test for finite value

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

     int isfinite(real-floating x);


DESCRIPTION
     The isfinite() macro determines whether its argument  has  a
     finite  value  (zero, subnormal, or normal, and not infinite
     or NaN). First, an argument represented in  a  format  wider
     than  its  semantic  type is converted to its semantic type.
     Then determination is based on the type of the argument.

RETURN VALUES
     The isfinite() macro returns a non-zero value if and only if
     its argument has a finite value.

ERORS
     No errors are defined.

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



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     MT-Safe                     
    


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













SunOS 5.11          Last change: 12 Jul 2006                    1