EXP(3M)             UNIX Programmer's Manual              EXP(3M)

NAME
     exp, log, log10, pow, sqrt - exponential, logarithm,  power,
     square root functions

SYNOPSIS
     #include <math.h>

     double exp (x)
     double x;

     double log (x)
     double x;

     double log10 (x)
     double x;

     double pow (x, y)
     double x, y;

     double sqrt (x)
     double x;

HP-UX COMPATIBILITY
     Level:    HP-UX/RUN ONLY

     Origin:   System III

DESCRIPTION
     _E_x_p returns the exponential function of _x.

     _L_o_g returns the natural logarithm of _x.

     _L_o_g_1_0 returns the common logarithm of _x.

     _P_o_w returns _x^_y.

     _S_q_r_t returns the square root of _x.

HARDWARE DEPENDENCIES
     Series 200/500:
          The algorithms used are those from HP 9000 BASIC.

SEE ALSO
     hypot(3M), sinh(3M).

DIAGNOSTICS
     _E_x_p returns a huge value when the correct value would  over-
     flow.   An  argument  out  of range may also result in _e_r_r_n_o
     being set to ERANGE.  Underflow returns a zero.

     _L_o_g returns a huge negative value and  sets  _e_r_r_n_o  to  EDOM
     when _x is non-positive.

     _P_o_w returns a huge negative value and  sets  _e_r_r_n_o  to  EDOM
     when  _x  is  non-positive and _y is not an integer, or when _x
     and _y are both zero.  It also returns a huge value when  the
     correct  value  would overflow.  A truly outrageous argument
     may also result in _e_r_r_n_o being  set  to  ERANGE.   Underflow
     causes _p_o_w to return zero and set _e_r_r_n_o to ERANGE.

     _S_q_r_t returns 0 and sets _e_r_r_n_o to EDOM when _x is negative.