lrint - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMElrint, lrintf, lrintl, llrint, llrintf, llrintl − round to nearest integer

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LIBRARYMath library (libm, −lm)

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SYNOPSIS#include <math.h>long lrint(double x); long lrintf(float x); long lrintl(long double x);long long llrint(double x); long long llrintf(float x); long long llrintl(long double x);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): All functions shown above: _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

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DESCRIPTIONThese functions round their argument to the nearest integer value, using the current rounding direction (see fesetround(3)). Note that unlike the rint(3) family of functions, the return type of these functions differs from that of their arguments.

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RETURN VALUEThese functions return the rounded integer value. If x is a NaN or an infinity, or the rounded value is too large to be stored in a long (long long in the case of the ll* functions), then a domain error occurs, and the return value is unspecified.

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ERRORSSee math_error(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur: Domain error: x is a NaN or infinite, or the rounded value is too large   An invalid floating-point exception (FE_INVALID) is raised. These functions do not set errno.

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VERSIONSThese functions were added in glibc 2.1.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue lrint(), lrintf(), lrintl(), llrint(), llrintf(), llrintl() Thread safetyMT-Safe

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STANDARDSC99, POSIX.1-2001, POSIX.1-2008.

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SEE ALSOceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3) 0

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