pow, powf, powl - General exponential function

Definition	#include <math.h> double pow(double x, double y); float powf(float x, float y); (C11) long double powl(long double x, long double y); (C11) These functions compute xy. If x is 0, y must be positive; if x is negative, y must be an integer value.
Return val.	x y	if x, y and the result are in the permissible range of floating-point numbers.
	+/-HUGE_VAL +/-HUGE_VALF +/-HUGE_VALL	depending on the function type and the sign of x, in the event of an overflow. In addition, errno is set to ERANGE (result too large).
	1.0	if x and y are equal to 0.
	-HUGE_VAL -HUGE_VALF -HUGE_VALL	depending on the function type, if x is equal to 0 and y is less than 0. In addition, errno is set to EDOM.
	undefined	if x is less than 0 and y is not an integer. In addition, errno is set to EDOM.
Example	The following program calculates xy for the input arguments x and y. #include <math.h> #include <stdio.h> int main(void) { double x, y; scanf("%lf %lf", &x, &y); printf("%g**%g : %g\n", x, y, pow(x,y)); return 0; }
See also	exp, hypot, log, log10, sinh, sqrt