exp, expf, expl - base-e exponential function
#include <math.h>
double exp(double x);
float expf(float x);
long double expl(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
These functions return the value of e (the base of natural
logarithms) raised to the power of x
.
On success, these functions return the exponential value of
x
.
If x
is a NaN, a NaN is returned.
If x
is positive infinity, positive infinity is
returned.
If x
is negative infinity, +0 is returned.
If the result underflows, a range error occurs, and zero is returned.
If the result overflows, a range error occurs, and the functions return +HUGE_VAL, +HUGE_VALF, or +HUGE_VALL, respectively.