Mathematical Library Functions                           erfc(3M)



NAME
     erfc, erfcf, erfcl - complementary error function

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

     double erfc(double x);


     float erfcf(float x);


     long double erfcl(long double x);


DESCRIPTION
     These function compute the complementary error function  1.0
     - erf(x).

RETURN VALUES
     Upon successful completion, these functions return the value
     of the complementary error function.


     If x is NaN, a NaN is returned.


     If x is ]0, ]1 is returned.


     If x is -Inf, ]2 is returned.


     If x is ]Inf, 0 is returned.

ERORS
     No errors are defined.

USAGE
     The erfc() function is provided because of the extreme  loss
     of relative accuracy if erf(x) is called for large x and the
     result subtracted from 1.0.

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








SunOS 5.11          Last change: 12 Jul 2006                    1






Mathematical Library Functions                           erfc(3M)



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


SEE ALSO
     erf(3M),  isnan(3M),  math.h(3HEAD),  attributes(5),   stan-
     dards(5)











































SunOS 5.11          Last change: 12 Jul 2006                    2