要获得2个日期之间的差异

from datetime import datetime

date1 = datetime.strptime('2022-01-01', '%Y-%m-%d')
date2 = datetime.strptime('2022-01-10', '%Y-%m-%d')

diff = date2 - date1
print(diff.days)

const date1 = new Date('2022-01-01');
const date2 = new Date('2022-01-10');

const diff = date2 - date1;
const days = Math.floor(diff / (1000 * 60 * 60 * 24));
console.log(days);

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;

public class Main {
    public static void main(String[] args) {
        LocalDate date1 = LocalDate.parse("2022-01-01");
        LocalDate date2 = LocalDate.parse("2022-01-10");

        long diff = ChronoUnit.DAYS.between(date1, date2);
        System.out.println(diff);
    }
}

using System;

class MainClass {
    public static void Main (string[] args) {
        DateTime date1 = DateTime.Parse("2022-01-01");
        DateTime date2 = DateTime.Parse("2022-01-10");

        TimeSpan diff = date2 - date1;
        Console.WriteLine(diff.Days);
    }
}