Formats numbers into strings with thousands separators for readability. It currently supports floating-points (f32 and f64), unsigned integers (u16, u32, and u64), signed integers (i16, i32, i64), and size types (isize and usize).

First, put separator as a dependency in your Cargo.toml as usual:

[dependencies]
separator = "0.3.1"

Then, import the Separatable trait, and call the separated_string on a number:

extern crate separator;

use separator::Separatable;

fn main() {
  let f = -120000000.34345;

  // Prints "-12,000,000.34345"
  println!("{}", f.separated_string());
}