查找前2个日期点之间的天数

from datetime import datetime

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

delta = date2 - date1
days = delta.days

print(days)

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

LocalDate date1 = LocalDate.parse("2022-01-01");
LocalDate date2 = LocalDate.parse("2022-01-10");

long days = ChronoUnit.DAYS.between(date1, date2);

System.out.println(days);

using System;

DateTime date1 = DateTime.ParseExact("2022-01-01", "yyyy-MM-dd", null);
DateTime date2 = DateTime.ParseExact("2022-01-10", "yyyy-MM-dd", null);

TimeSpan span = date2 - date1;
int days = span.Days;

Console.WriteLine(days);