Days between dates: Difference between revisions

=={{header|Rust}}==

<lang rust>// [dependencies]

// chrono = "0.4"

use chrono::NaiveDate;

fn main() {

let args: Vec<String> = std::env::args().collect();

if args.len() != 3 {

eprintln!("usage: {} start-date end-date", args[0]);

std::process::exit(1);

}

if let Ok(start_date) = NaiveDate::parse_from_str(&args[1], "%F") {

if let Ok(end_date) = NaiveDate::parse_from_str(&args[2], "%F") {

let d = end_date.signed_duration_since(start_date);

println!("{}", d.num_days());

} else {

eprintln!("Can't parse end date");

std::process::exit(1);

}

} else {

eprintln!("Can't parse start date");

std::process::exit(1);

}

}</lang>

{{out}}

<pre>

days_between_dates 2020-01-01 2020-09-06

249

</pre>