freebsd man page for round

ROUND(3)						   BSD Library Functions Manual 						  ROUND(3)

NAME
     round, roundf, roundl -- round to nearest integral value

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     round(double x);

     float
     roundf(float x);

     long double
     roundl(long double x);

DESCRIPTION
     The round(), roundf(), and roundl() functions return the nearest integral value to x; if x lies halfway between two integral values, then
     these functions return the integral value with the larger absolute value (i.e., they round away from zero).

SEE ALSO
     ceil(3), floor(3), ieee(3), lrint(3), lround(3), math(3), rint(3), trunc(3)

STANDARDS
     These functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
     The round() and roundf() functions appeared in FreeBSD 5.3.  The roundl() function appeared in FreeBSD 6.0.

BSD
								   April 7, 2005							       BSD