EXP(3)                   BSD Library Functions Manual                   EXP(3)

NAME
     exp, exp2, expm1 -- exponential functions

SYNOPSIS
     ##include <>

     double
     exp(double x);

     long double
     expl(long double x);

     float
     expf(float x);

     double
     exp2(double x);

     long double
     exp2l(long double x);

     float
     exp2f(float x);

     double
     expm1(double x);

     long double
     expm1l(long double x);

     float
     expm1f(float x);

DESCRIPTION
     The exp() function computes e**x, the base-e exponential of x.

     The exp2() function computes 2**x, the base-2 exponential of x.

     The expm1() function computes the base-e exponential of x , minus 1 accu-
     rately even for very small values of x.

SPECIAL VALUES
     exp(]-0) and exp2(]-0) return 1.

     exp(-infinity) and exp2(-infinity) return ]0.

     exp(]infinity) and exp2(]infinity) return ]infinity.

     expm1(]-0) returns ]-0.

     expm1(-infinity) returns -1.

     expm1(]infinity) returns ]infinity.

     For all these functions, a range error occurs if the magnitude of x is
     too large.

SEE ALSO
     math(3)

STANDARDS
     The exp() , exp2() , and expm1() functions conform to ISO/IEC
     9899:1999(E).

4th Berkeley Distribution      January 30, 2003      4th Berkeley Distribution