LOG(3) BSD Library Functions Manual LOG(3)

NAME
     lloogg, lloogg22, lloogg1100, lloogg11pp, - logarithm functions

SYNOPSIS
     ##iinncclluuddee <>

     double
     lloogg(double x);

     long double
     llooggll(long double x);

     float
     llooggff(float x);

     double
     lloogg22(double x);

     long double
     lloogg22ll(long double x);

     float
     lloogg22ff(float x);

     double
     lloogg1100(double x);

     long double
     lloogg1100ll(long double x);

     float
     lloogg1100ff(float x);

     double
     lloogg11pp(double x);

     long double
     lloogg11ppll(long double x);

     float
     lloogg11ppff(float x);

DESCRIPTION
     The lloogg() function computes the value of the natural logarithm of argu-
     ment x.

     The lloogg22() function computes the value of the logarithm of argument x to
     base 2.

     The lloogg1100() function computes the value of the logarithm of argument x to
     base 10.

     The lloogg11pp() function computes the value of log(1+x) accurately even for
     very small values of x.

SSPPEECCIIAALL VVAALLUUEESS
     lloogg(+-0) , lloogg22(+-0) , and lloogg1100(+-0) return -infinity and raise the
     "divide-by-zero" floating-point exception.

     lloogg(1) , lloogg22(1) , and lloogg1100(1) return +0.

     lloogg(x) , lloogg22(x) , and lloogg1100(x) return a NaN and raise the "invalid"
     floating-point exception for x < 0.

     lloogg(+infinity) , lloogg22(+infinity) , and lloogg1100(+infinity) return +infinity.

     lloogg11pp(+-0) returns +-0.

     lloogg11pp(-1) returns -infinity and raises the "divide-by-zero" floating-
     point exception.

     lloogg11pp(x) returns a NaN and raises the "invalid" floating-point exception
     for x < -1.

     lloogg11pp(+infinity) returns +infinity.

SEE ALSO
     math(3), exp(3), exp2(3), expm1(3), pow(3)

STANDARDS     The lloogg() , lloogg22() , lloogg1100() , and lloogg11pp() functions conform to ISO/IEC
     9899:1999(E).

4th Berkeley Distribution        July 2, 2003        4th Berkeley Distribution