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

NAME
     exp, exp2, expm1 -- exponential functions

SYNOPSIS
     #include <math.h>

     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 accurately even for very small val-ues values
     ues of x.

SPECIAL VALUES
     exp(+-_) and exp2(+-_) return 1.

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

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

     expm1(+-_) 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                     December 11, 2006                    4th Berkeley Distribution