erfcl(3m) - osol9

1erfc(3M)                Mathematical Library Functions                erfc(3M)
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NAME

6       erfc, erfcf, erfcl - complementary error function
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SYNOPSIS

9       c99 [ flag... ] file... -lm [ library... ]
10       #include <math.h>
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12       double erfc(double x);
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15       float erfcf(float x);
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18       long double erfcl(long double x);
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DESCRIPTION

22       These function compute the complementary error function 1.0 − erf(x).
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RETURN VALUES

25       Upon  successful  completion,  these  functions return the value of the
26       complementary error function.
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29       If x is NaN, a NaN is returned.
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32       If x is ±0, +1 is returned.
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35       If x is −Inf, +2 is returned.
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38       If x is +Inf, 0 is returned.
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ERRORS

41       No errors are defined.
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USAGE

44       The erfc() function is provided because of the extreme loss of relative
45       accuracy if erf(x) is called for large x and the result subtracted from
46       1.0.
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ATTRIBUTES

49       See attributes(5) for descriptions of the following attributes:
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54       ┌─────────────────────────────┬─────────────────────────────┐
55       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
56       ├─────────────────────────────┼─────────────────────────────┤
57       │Interface Stability          │Standard                     │
58       ├─────────────────────────────┼─────────────────────────────┤
59       │MT-Level                     │MT-Safe                      │
60       └─────────────────────────────┴─────────────────────────────┘
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