crate documentation minimum rustc 1.8 build status

Integer trait and functions for Rust.


Add this to your Cargo.toml:

num-integer = "0.1"

and this to your crate root:

extern crate num_integer;


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

version = "0.1.36"
default-features = false

There is no functional difference with and without std at this time, but there may be in the future.

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-integer crate is tested for rustc 1.8 and greater.


Licensed under either of

at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.