How can I change the formatter's decimal separator in Rust?

Question

The function below results in "10.000". Where I live this means "ten thousand".

format!("{:.3}", 10.0);

I would like the output to be "10,000".

Answer 1

Since the standard library doesn't have this functionality (localization of number format), you can just replace the dot with a comma:

fn main() {
    println!("{}", format!("{:.3}", 10.0).replacen(".", ",", 1));
}

There are other ways of doing this, but this is probably the most straightforward solution.