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rint, lrint, llrint

From cppreference.com
< c | numeric | math
 
 
 
Common mathematical functions
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remainder(C99)
remquo(C99)
fma(C99)
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nan
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(C99)
(C99)
(C99)
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Nearest integer floating point operations
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(C99)
(C99)
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rint
lrint
llrint
(C99)
(C99)
(C99)
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Macro constants
 
Defined in header <math.h>
int rintf( float arg );
(since C99)
int rint( double arg );
(since C99)
int rintl( long double arg );
(since C99)
long lrintf( float arg );
(since C99)
long lrint( double arg );
(since C99)
long lrintl( long double arg );
(since C99)
long long llrintf( float arg );
(since C99)
long long llrint( double arg );
(since C99)
long long llrintl( long double arg );
(since C99)

Rounds the floating-point argument arg to an integer value in floating-point format, using the current rounding mode. If the result differs from arg (i.e., arg was not an integer value already), the floating-point exception FE_INEXACT is raised.

Contents

[edit] Parameters

arg - floating point value

[edit] Return value

The integer result of rounding arg

[edit] Notes

The only difference between nearbyint and rint is that rint may raise the FE_INEXACT floating-point exception, while nearbyint never raises it.

[edit] Example

[edit] See also

nearest integer using current rounding mode
(function) [edit]
(C99)
nearest integer not greater in magnitude than the given value
(function) [edit]