2.9BSD/usr/man/cat3/exp.3m

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

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

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;

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
     base 10 logarithm.

     _P_o_w returns _x8_y9.

     _S_q_r_t returns the square root of _x.

SEE ALSO
     intro(2), hypot(3M), sinh(3M)

DIAGNOSTICS
     _E_x_p and _p_o_w return a huge value when the correct value would
     overflow; _e_r_r_n_o is set to ERANGE.  _P_o_w returns 0 and sets
     _e_r_r_n_o to EDOM when the second argument is negative and non-
     integral and when both arguments are 0.

     _L_o_g returns 0 when _x is zero or negative; _e_r_r_n_o is set to
     EDOM.

     _S_q_r_t returns 0 when _x is negative; _e_r_r_n_o is set to EDOM.

Printed 5/17/83                                                 1