HP-UX Reference (11i v1 05/09) - 3 Library Functions N-Z (vol 7)

round(3M) round(3M)

NAME

round() - round function

SYNOPSIS

#include <math.h>

double round(double x);

DESCRIPTION

round() rounds its argument to the nearest integral value in ﬂoating-point format. An argument exactly

halfway between two integers is rounded away from zero, regardless of the current rounding direction.

Rounding away from zero also applies to the functions,

lroundand llround.

The ISO/ANSI C committee has approved the

round() function for inclusion in the C9X draft standard.

To use this function, compile either with the default

-Ae option or with the -Aa and -D_HPUX_SOURCE

options. Make sure your program includes <

math.h>. Link in the math library by specifying -lm on the

compiler or linker command line.

RETURN VALUE

The

round() function returns the rounded integral value.

ERRORS

No errors are deﬁned.