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 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).