round, roundf, roundl - Round off to nearest whole number

Definition	#include <math.h> double round(double x); float roundf (float x); long double roundl (long double x); Each of the functions returns the whole number nearest to x, in floating point representation. round represents the result as a number of type double, roundf as a number of type float, and roundl as a number of type long double. The return value is independent of the defined rounding mode. If the difference between x and the rounded result is exactly 0.5, the larger whole number is returned.
Return val.	integer	represented as a number of type double, float or long double if successful.
	undefined	in the event of an overflow or underflow, errno is set to ERANGE to indicate the error.
See also	abs, ceil, floor, llrint, llround, lrint, lround, rint