### 24 releases (7 breaking)

0.7.1 | Jun 8, 2023 |
---|---|

0.6.9 | May 1, 2023 |

0.6.7 | Mar 7, 2023 |

0.3.0 | Dec 28, 2022 |

0.2.0 | Nov 15, 2022 |

#**571** in Math

**1,439** downloads per month

Used in precise-calc

**MIT**license

715KB

15K
SLoC

Astro-float (astronomically large floating point numbers) is a library that implements arbitrary precision floating point numbers with correct rounding purely in Rust.

The library implements the basic operations and functions. It uses classical algorithms such as Karatsuba, Toom-Cook, Schönhage-Strassen algorithm, and others.

The library can work without the standard library provided there is a memory allocator.

## What's new

Information about the latest changes is available in Release notes

## Usage

Below is an example of using the library. For more information please refer to the library documentation: https://docs.rs/astro-float/latest/astro_float/

Calculate Pi with 1024 bit precision rounded to even.

`use` `astro_float``::`Consts`;`
`use` `astro_float``::`RoundingMode`;`
`use` `astro_float``::``ctx``::`Context`;`
`use` `astro_float``::`expr`;`
`//` Create a context with precision 1024, and rounding to even.
`let` `mut` ctx `=` `Context``::`new`(``1024``,` `RoundingMode``::`ToEven`,`
`Consts``::`new`(``)``.``expect``(``"`Contants cache initialized`"``)``)``;`
`//` Compute pi: pi = 6*arctan(1/sqrt(3))
`let` pi `=` `expr!``(``6` `*` `atan``(``1` `/` `sqrt``(``3``)``)``,` `&``mut` ctx`)``;`
`//` Use library's constant value for verifying the result.
`let` pi_lib `=` ctx`.``const_pi``(``)``;`
`//` Compare computed constant with library's constant
`assert_eq!``(`pi`.``cmp``(``&`pi_lib`)``,` `Some``(``0``)``)``;`

## Performance

Benchmark can be found here: https://github.com/stencillogic/bigfloat-bench.

## Contributing

Issues regarding bugs or new features can be opened here: https://github.com/stencillogic/astro-float/issues

For more information please check CONTRIBUTING.md

#### Dependencies

~1.3–1.8MB

~42K SLoC