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
Check Out this Related Man Page
ROUND(3) Linux Programmer's Manual ROUND(3)NAME
round, roundf, roundl - round to nearest integer, away from zero
SYNOPSIS
#include <math.h>
double round(double x);
float roundf(float x);
long double roundl(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
round(), roundf(), roundl():
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
DESCRIPTION
These functions round x to the nearest integer, but round halfway cases away from zero (regardless of the current rounding direction, see
fenv(3)), instead of to the nearest even integer like rint(3).
For example, round(0.5) is 1.0, and round(-0.5) is -1.0.
RETURN VALUE
These functions return the rounded integer value.
If x is integral, +0, -0, NaN, or infinite, x itself is returned.
ERRORS
No errors occur. POSIX.1-2001 documents a range error for overflows, but see NOTES.
VERSIONS
These functions first appeared in glibc in version 2.1.
ATTRIBUTES
Multithreading (see pthreads(7))
The round(), roundf(), and roundl() functions are thread-safe.
CONFORMING TO
C99, POSIX.1-2001.
NOTES
POSIX.1-2001 contains text about overflow (which might set errno to ERANGE, or raise an FE_OVERFLOW exception). In practice, the result
cannot overflow on any current machine, so this error-handling stuff is just nonsense. (More precisely, overflow can happen only when the
maximum value of the exponent is smaller than the number of mantissa bits. For the IEEE-754 standard 32-bit and 64-bit floating-point num-
bers the maximum value of the exponent is 128 (respectively, 1024), and the number of mantissa bits is 24 (respectively, 53).)
If you want to store the rounded value in an integer type, you probably want to use one of the functions described in lround(3) instead.
SEE ALSO ceil(3), floor(3), lround(3), nearbyint(3), rint(3), trunc(3)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2013-06-21 ROUND(3)
Hello,
In a unix shell script,i want to round a variabele to a nearest number
Ex: set count=104.4
How can i round that to 105.?
Thanks,
Sateesh (2 Replies)
Hi Friends,
I need a help again in awk.
I just need to round up a value.
Eg Say x=5.664584525
I need to display x=5.66 means round. How can i do round in UNIX. (6 Replies)
i'm a newbie here, i need help with a shell script.
for a given number, if it is greater than ten round to the nearest 10
same for 100, if it is greater than 100 round to the nearest 100, and same for 1000.
i'm confused how to start this...
its supposed to look like this
input ... (11 Replies)
i have a file in which 3 values are stored like --4.72 4.42 3.86
what i wanna do is that take read each value and compare with a fixed value say 5 but cant do so as i am getting an error for the same.
please check the code
cat /home/nsadm/auto/Logging/uptime.txt| while read a b c
do
if... (2 Replies)
Hey everyone, I was wondering if i am able to write a sed command to round a number to two decimal places. So for example:
1.58674
would be
1.58
I just want to chop off the numbers to the right of the second digit after the period. I know this is probably trivial but the closest i got was... (8 Replies)
Hi all of you,
Would be great if you help me with how to round up to whole number from my input values like
2.99996,2.17890,3.00002,-2.3456,-2.7890
o/p should be like 3,2,3,-2,-3
thnks in adv!!!!
regards (3 Replies)