rint

Name

nearbyint, nearbyintf, nearbyintl, rint, rintf, rintl
- round to nearest integer

Library

libm.lib

Synopsis

#include <math.h>

double nearbyint (double x);

float nearbyintf (float x);

long double nearbyintl (long double x);

double rint (double x);

float rintf (float x);

long double rintl (long double x);

Return values

x is integral or infinite, x itself is returned.

Detailed description

The rint and rintf functions return the integral value nearest to x according to the prevailing rounding mode.

The nearbyint and nearbyintf functions perform the same operation. The functions nearbyintl and rintl are aliases to the functions nearbyint and rint respectively.

Examples

#include <math.h>
int main( )
{
   double inp = 1.5;
   double y;
   y = nearbyint( inp );
   printf( "nearbyint(%f ) = %f\n", inp,  y );
   y = nearbyintf( inp );
   printf( "nearbyintf(%f ) = %f\n", inp, y );
   y = nearbyintl( inp );
   printf( "nearbyintl(%f ) = %f\n\n", inp, y );
   y = rint( inp );
   printf( "rint(%f ) = %f\n", inp,  y );
   y = rintf( inp );
   printf( "rintf(%f ) = %f\n", inp, y );
   y = rintl( inp );
   printf( "rintl(%f ) = %f\n\n", inp, y ); 
}

Output

nearbyint  ( 1.5 ) = 2.000000
nearbyintf ( 1.5 ) = 2.000000
nearbyintl ( 1.5 ) = 2.000000
rint ( 1.5 ) = 2.000000
rintf( 1.5 ) = 2.000000
rintl( 1.5 ) = 2.000000

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