erf(3M) erf(3M)[top]NAMEerf(), erff(), erfl(), erfw(), erfq(), erfc(), erfcf(), erfcl(), erfcw(), erfcq() - error function and complementary error functionsSYNOPSISHP Integrity Server OnlyDESCRIPTIONreturns the error function of x, defined as: returns the complementary value, 1.0 − It prevents the extreme loss of relative accuracy if is called for a large x and the result is sub‐ tracted from 1.0. (For example, for x = 5, twelve decimal places are lost.) Integrity Server Only and are versions of and respectively; they take a argument and return a result. and are versions of and respectively; they take a argument and return a result. and are versions of and respectively; they take an argument and return an result. and are equivalent to and respectively on HP-UX systems.USAGETo use these functions compile either with the default option or with the and options. To use (for Integrity servers) or compile also with the option. To use any of these functions, make sure your program includes and link in the math library by specifying on the compiler or linker command line. For more information, see the at the following site:RETURN VALUEIf x is +INFINITY, returns 1.0. If x is −INFINITY, returns −1.0. If x is +INFINITY, returns zero. If x is −INFINITY, returns 2.0. Whether and raise the inexact exception is unspecified. If x is NaN, and return NaN.ERRORSNo errors are defined.SEE ALSOexp(3M), pow(3M), sqrt(3M), math(5).STANDARDS CONFORMANCE: SVID3, XPG4.2, ISO/IEC C99 (including Annex F, ``IEC 60559 floating- point arithmetic'') : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arith‐ metic'') erf(3M)

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