Round to nearest integer value using the current rounding direction.
#include <math.h>
long lrint (x)
double x;
long lrintf (x)
float x;
long lrintl (x)
long double x;
long lrintd32 (x)
_Decimal32 x;
long lrintd64 (x)
_Decimal64 x;
long lrintd128 (x)
_Decimal128 x;The lrint, lrintf, lrintl, lrintd32, lrintd64, and lrintd128 subroutines round the x parameter to the nearest integer value, rounding according to the current rounding direction.
An application wishing to check for error situations should set the errno global variable to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these subroutines. Upon return, if errno is nonzero or fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is nonzero, an error has occurred.
| Item | Description |
|---|---|
| x | Specifies the value to be rounded. |
Upon successful completion, the lrint, lrintf, lrintl, lrintd32, lrintd64, and lrintd128 subroutines return the rounded integer value.
If x is NaN, a domain error occurs and an unspecified value is returned.
If x is +Inf, a domain error occurs and an unspecified value is returned.
If x is -Inf, a domain error occurs and an unspecified value is returned.
If the correct value is positive and too large to represent as a long, a domain error occurs and an unspecified value is returned.
If the correct value is negative and too large to represent as a long, a domain error occurs and an unspecified value is returned.