number-of-days-between-two-dates

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Algorithms

Write a program to count the number of days between two dates.

The two dates are given as strings, their format is <code>YYYY-MM-DD</code>&nbsp;as shown in the examples.

&nbsp;
Example 1:
<pre>Input: date1 = "2019-06-29", date2 = "2019-06-30"
Output: 1
</pre>Example 2:
<pre>Input: date1 = "2020-01-15", date2 = "2019-12-31"
Output: 15
</pre>
&nbsp;
Constraints:

<ul>
	<li>The given dates are valid&nbsp;dates between the years <code>1971</code> and <code>2100</code>.</li>
</ul>

daysBetweenDates

Number of Days Between Two Dates

Count Days Spent Together

count-days-spent-together

统计共同度过的日子数

Math

String

请你编写一个程序来计算两个日期之间隔了多少天。

日期以字符串形式给出，格式为&nbsp;<code>YYYY-MM-DD</code>，如示例所示。

&nbsp;

示例 1：

<pre>输入：date1 = &quot;2019-06-29&quot;, date2 = &quot;2019-06-30&quot;
输出：1
</pre>

示例 2：

<pre>输入：date1 = &quot;2020-01-15&quot;, date2 = &quot;2019-12-31&quot;
输出：15
</pre>

&nbsp;

提示：

<ul>
	<li>给定的日期是&nbsp;<code>1971</code>&nbsp;年到 <code>2100</code>&nbsp;年之间的有效日期。</li>
</ul>