exp, expf, expl - Exponential function

Definition	#include <math.h> double exp(double x); float expf(float x); (C11) long double expl(long double x); (C11) These functions calculate the exponential function for permissible floating-point numbers x.
Returnwert	e x	if successful.
	HUGE_VAL HUGE_VALF HUGE_VALL	depending on the function type, if an overflow occurs. errno is set to ERANGE (result too large).
Example	The following program calculates ex for an input value x. #include <math.h> #include <stdio.h> int main(void) { double x; printf("Please enter a floating-point number:\n"); if (scanf("%lf", &x) == 1) printf("exp(%g) = %g\n", x, exp(x)); return 0; }
See also	exp2, log, log2, log10, pow