1ERF(3)                     Linux Programmer's Manual                    ERF(3)
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NAME

6       erf,  erff, erfl, erfc, erfcf, erfcl - error function and complementary
7       error function
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SYNOPSIS

10       #include <math.h>
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12       double erf(double x);
13       float erff(float x);
14       long double erfl(long double x);
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16       double erfc(double x);
17       float erfcf(float x);
18       long double erfcl(long double x);
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20       Link with -lm.
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DESCRIPTION

23       The erf() function returns the error function of x; defined as
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25       erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt
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27       The erfc() function returns the complementary error function of x, that
28       is 1.0 - erf(x).
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CONFORMING TO

31       SVr4, 4.3BSD, C99.  The float and long double variants are requirements
32       of C99.
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SEE ALSO

35       cerf(3), exp(3)
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39BSD                               2002-07-27                            ERF(3)