SYNOPSIS
#include <math.h> double exp(double x); float expf(float x);
DESCRIPTION
exp
and expf
calculate the exponential of x,
that is, ex (where e is the base of the natural system of
logarithms, approximately 2.71828).
You can use the (non-ANSI) function, matherr, to specify error handling for these functions.
RETURNS
On success, exp
and expf
return the calculated value. If the
result underflows, the returned value is 0.
If the result overflows, the returned value is HUGE_VAL.
In either case, errno
is set to ERANGE.
COMPLIANCE
exp
is ANSI C. expf
is an extension.