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C# 默认参数值


默认参数值

您也可以使用默认参数值,方法是使用等号 (=)。

如果我们不带参数调用该方法,它将使用默认值 (“Norway”)

示例

static void MyMethod(string country = "Norway") 
{
  Console.WriteLine(country);
}

static void Main(string[] args)
{
  MyMethod("Sweden");
  MyMethod("India");
  MyMethod();
  MyMethod("USA");
}

// Sweden
// India
// Norway
// USA

亲自试一试 »

具有默认值的参数通常称为“可选参数”。从上面的示例中,country 是一个可选参数,而 "Norway" 是默认值。


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