lround, lroundf, lroundl, llround, llroundf, llroundl - round to nearest integer

```
#include <math.h>
long int lround(double x);
long int lroundf(float x);
long int lroundl(long double x);
long long int llround(double x);
long long int llroundf(float x);
long long int llroundl(long double x);
```

Link with `-lm`

.

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

All functions shown above:

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

These 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.

See 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`

.

These functions first appeared in glibc in version 2.1.

C99, POSIX.1-2001, POSIX.1-2008.

This page is part of release 4.15 of the Linux `man-pages`

project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.