Name | Synopsis | Description | Return Values | Attributes | See Also
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double erf(double x);
float erff(float x);
long double erfl(long double x);
These functions compute the error function of their argument x, defined as:
Upon successful completion, these functions return the value of the error function.
If x is NaN, a NaN is returned.
If x is ±0, ±0 is returned.
If x is ±Inf, ±1 is returned.
If x is subnormal, 2/sqrt(??) * 2 is returned.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE |
ATTRIBUTE VALUE |
---|---|
Interface Stability |
Standard |
MT-Level |
MT-Safe |
erfc(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)
Name | Synopsis | Description | Return Values | Attributes | See Also