128 bit integers

Minimum Rust version: 1.26

A very simple feature: Rust now has 128 bit integers!

  2. #![allow(unused_variables)]
  3. fn main() {
  4. let x: i128 = 0;
  5. let y: u128 = 0;
  6. }

These are twice the size of u64, and so can hold more values. More specifically,

  • u128: 0 - 340,282,366,920,938,463,463,374,607,431,768,211,455
  • i128: −170,141,183,460,469,231,731,687,303,715,884,105,728 - 170,141,183,460,469,231,731,687,303,715,884,105,727

Whew!