roundup - round up in steps

       The arguments may be evaluated more than once.

       x should be nonnegative, and step should be positive.

       If x+step would overflow or wrap around, the behavior is undefined.

       This macro rounds x to the nearest multiple of step that is not less than x.

       It is typically used for rounding up a pointer to align it or increasing a buffer to be allocated.

       This  API  is  not  designed to be generic, and doesn't work in some cases that are not important for the
       typical use cases described above.  See CAVEATS.

       Standard C library (libc)

       roundup - round up in steps

       This macro returns the rounded value.

ceil(3), floor(3), lrint(3), rint(3), lround(3), round(3)

Linux man-pages 6.9.1                              2024-05-02                                         roundup(3)

       None.

#include<sys/param.h>roundup(x,step);