Commanfy using the thousands crate

A while ago I wrote an example showing how to commafy a number, that is how to make numbers more readable by separating every 3 digits? e.g. Instead of 1234567 it is much more readable to have this: 1,234,567.

I was pointed to the thousands crate that provides a trait called separate_with_commas that does exactly this.

Here is how to use it:

See Cargo.toml for the dependencies

examples/commafy-thousands/Cargo.toml

[package]
name = "commafy-thousands"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
thousands = "0.2.0"

See the code:

examples/commafy-thousands/src/main.rs

use thousands::Separable;

fn main() {
    let number = 12345;
    println!("{:10} {:>10}",  number, number.separate_with_commas());

    let number = 123;
    println!("{:10} {:>10}",  number, number.separate_with_commas());

    let number = -12345;
    println!("{:10} {:>10}",  number, number.separate_with_commas());

    let number = -123;
    println!("{:10} {:>10}",  number, number.separate_with_commas());

    let number = -1234.5;
    println!("{:10} {:>10}",  number, number.separate_with_commas());
}

See the output

     12345     12,345
       123        123
    -12345    -12,345
      -123       -123
   -1234.5   -1,234.5