integer - Perl pragma to compute arithmetic in integer instead of double
$x = 10/3;
# $x is now 3, not 3.33333333333333333
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 Pragmatic Modules.