RINT(3) | Library Functions Manual | RINT(3) |
rint
, lrint
,
llrint
— round to integral
value
#include
<math.h>
double
rint
(double
x);
long double
rintl
(long
double x);
float
rintf
(float
x);
long int
lrint
(double
x);
long int
lrintl
(long
double x);
long int
lrintf
(float
x);
long long int
llrint
(double
x);
long long int
llrintl
(long
double x);
long long int
llrintf
(float
x);
The
rint
()
functions return the integral value nearest to x
(according to the prevailing rounding mode) in floating-point format.
The
lrint
() and
llrint
()
functions return the integral value nearest to x
(according to the prevailing rounding mode) in the return formats specified.
If the rounded value is outside the range of the return type, the numeric
result is unspecified and the "invalid" floating-point exception
is raised. A range error may occur if the magnitude of
x is too large.
rint
(±0)
returns ±0 for all rounding modes.
rint
(±infinity)
returns ±infinity for all rounding modes.
All these functions raise the "inexact" floating-point exception if the result differs in value from the argument (except when they raise some other floating-point exception, such as "invalid").
The
rinttol
()
function is deprecated. Please use the C99 function
lrint
() instead.
The rint
() ,
lrint
() , and llrint
()
functions conform to ISO/IEC 9899:2011.
July 2, 2008 | macOS 14.6 |