integer(3)

NNAAMMEE
       integer - Perl pragma to compute arithmetic in integer
       instead of double

SSYYNNOOPPSSIISS
           use integer;
           $x = 10/3;
           # $x is now 3, not 3.33333333333333333

DDEESSCCRRIIPPTTIIOONN
       This tells the compiler that it's okay to use integer
       operations from here to the end of the enclosing BLOCK.
       On many machines, this doesn't matter a great deal for
       most computations, but on those without floating point
       hardware, it can make a big difference.

       See the section on Pragmatic Modules in the perlmod
       manpage.