integer - Perl pragma to compute arithmetic in integer instead of double
use integer; $x = 10/3; # $x is now 3, not 3.33333333333333333
This tells the compiler 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.
Note that this affects the operations, not the numbers. If you run this code
use integer; $x = 1.5; $y = $x + 1; $z = -1.5;
you'll be left with $x == 1.5, $y == 2 and $z == -1. The $z case happens because unary - counts as an operation.
$x == 1.5
$y == 2
$z == -1
-
See "Pragmatic Modules" in perlmod.
To install lib, copy and paste the appropriate command in to your terminal.
cpanm
cpanm lib
CPAN shell
perl -MCPAN -e shell install lib
For more information on module installation, please visit the detailed CPAN module installation guide.