crate documentation minimum rustc 1.15 Travis status

Generic Rational numbers for Rust.


Add this to your Cargo.toml:

num-rational = "0.2"

and this to your crate root:

extern crate num_rational;


This crate can be used without the standard library (#![no_std]) by disabling the default std feature. Use this in Cargo.toml:

version = "0.2"
default-features = false

Implementations for i128 and u128 are only available with Rust 1.26 and later. The build script automatically detects this, but you can make it mandatory by enabling the i128 crate feature.


Release notes are available in


The num-rational crate is tested for rustc 1.15 and greater.