lrint(3) Library Functions Manual lrint(3) lrint, lrintf, lrintl, llrint, llrintf, llrintl - (libm -lm) #include 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); glibc ( feature_test_macros(7)): : _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L ( fesetround(3)). rint(3) . . x NaN long ( long long ll*) . math_error(7) . : : x (NaN) (FE_INVALID). errno. attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |lrint() | | MT-Safe | |lrintf() | | | |lrintl() | | | |llrint() | | | |llrintf()| | | |llrintl() | | | +------------+------------------------------------+--------------------+ C11, POSIX.1-2008. glibc 2.1. C99 POSIX.1-2001. ceil(3) floor(3) lround(3) nearbyint(3) rint(3) round(3) 3 . . : . 6.18 8 2026 lrint(3)