Obtain an exponent function
[Classification]
Mathematical library
[Syntax]
#include <math.h>
float __far expf(float x);
[Return value]
Returns the xth power of e.
expf returns 0 or an denormal number if an underflow occurs, and sets macro ERANGE to global variable errno.
If an overflow occurs, expf returns and sets macro ERANGE to global variable errno.
[Description]
This function calculates the xth power of e (e is the base of a natural logarithm and is about 2.71828).