---
name: "integer"
section: "3pm"
platform: "linux"
package: "perl-5.004-doc"
version: "5.004.05-6"
release: "Debian 2.2 (Potato)"
platforms: ["linux"]
url: "https://new.carta.tech/integer/3pm"
---

# integer(3pm)

Perl pragma to compute arithmetic in integer instead of double

## NAME

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

## SYNOPSIS

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

## DESCRIPTION

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.

See the section on *Pragmatic Modules* in the *perlmod* manpage.