日期时间。C# 中的 IsLeapYear()方法
原文:https://www . geesforgeks . org/datetime-islapyear-method-in-c-sharp/
此方法返回指定年份是否为闰年的指示。在这里，年份总是被解释为公历中的一年。
语法:
public static bool IsLeapYear (int year);
返回值:如果年份是闰年，这个方法返回真，否则返回假。
异常:如果年小于 1 或大于 9999，此方法将给出argumentout of range Exception。
以下程序说明了上述方法的使用:
例 1:
C
// C# code to demonstrate the
// IsLeapYear(Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
// Checking the leap year between 2000 to 2019
for (int y = 2000; y <= 2019; y++)
{
// using method
if (DateTime.IsLeapYear(y))
{
Console.WriteLine("{0} is a Leap Year.", y);
}
else
{
Console.WriteLine("{0} is not a Leap Year.", y);
}
}
}
}
输出:
2000 is a Leap Year.
2001 is not a Leap Year.
2002 is not a Leap Year.
2003 is not a Leap Year.
2004 is a Leap Year.
2005 is not a Leap Year.
2006 is not a Leap Year.
2007 is not a Leap Year.
2008 is a Leap Year.
2009 is not a Leap Year.
2010 is not a Leap Year.
2011 is not a Leap Year.
2012 is a Leap Year.
2013 is not a Leap Year.
2014 is not a Leap Year.
2015 is not a Leap Year.
2016 is a Leap Year.
2017 is not a Leap Year.
2018 is not a Leap Year.
2019 is not a Leap Year.
例 2:
C
// C# code to demonstrate the
// IsLeapYear(Int32) Method
using System;
class GFG {
// Main Method
public static void Main()
{
// using method
if (DateTime.IsLeapYear(9999))
{
Console.WriteLine("9999 is a Leap Year.");
}
else
{
Console.WriteLine("9999 is not a Leap Year.");
}
// using method will give an error
// as year's value is greater than
// 9999
if (DateTime.IsLeapYear(10000))
{
Console.WriteLine(" 10000 is a Leap Year.");
}
else {
Console.WriteLine("10000 is not a Leap Year.");
}
}
}
运行时错误:
未处理异常: 系统。ArgumentOutOfRangeException:年份必须介于 1 和 9999 之间。 参数名称:年份
参考:
- https://docs . Microsoft . com/en-us/dotnet/API/system . datetime . islapy ear？视图=netframework-4.7.2
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