|No such thing as a small change|
perlman:lib:integerby root (Scribe)
|on Dec 23, 1999 at 00:49 UTC||Need Help??|
See the current Perl documentation for lib:integer.
Here is our local, out-dated (pre-5.6) version:
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