This is a library for working with numbers of arbitrarily finite size.

JavaScript (and to some extension PureScript) has quite a few drawbacks when it comes to large numbers. For example, PureScript's `Int`

primitive is a member of the `Bounded`

typeclass, with `top == 2 ^ 31 - 1`

and `bottom == - (2 ^ 32)`

.

The PureScript `Number`

primitive is not `Bounded`

in the same way; however, there are problems with manipulating large-enough `Number`

s:

```
> import Prelude
> let x = 900000000000000000.0
> :t x
Number
> x + 1.0 == x
true
> x + 1.0
900000000000000000
```

In this library, correctness is prioritized above all else:

```
> import Data.HugeNum
> let x = fromNumber 900000000000000000.0
> let y = fromNumber 1.0
> x + y == x
false
> x + y
HugeNum 900000000000000001.0
```

Addition is implemented using an elementary-school method. Multiplication follows Karatsuba.

## Installation

```
bower install purescript-precise
```

## Documentation

Module documentation is published on Pursuit.