Mathematical Library Functions                       isnormal(3M)



NAME
     isnormal - test for a normal value

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

     int isnormal(real-floating x);


DESCRIPTION
     The isnormal() macro determines whether its  argument  value
     is  normal  (neither  zero,  subnormal,  infinite, nor NaN).
     First, an argument represented in a format  wider  than  its
     semantic type is converted to its semantic type. Then deter-
     mination is based on the type of the argument.

RETURN VALUES
     The isnormal() macro returns a non-zero value if and only if
     its argument has a normal 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),    isfinite(3M),    isinf(3M),    isnan(3M),
     math.h(3HEAD), signbit(3M), attributes(5), standards(5)













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