1.6 KiB
1.6 KiB
title | localeTitle |
---|---|
Break statement | 休息声明 |
休息声明
break
语句终止它出现的封闭循环或switch语句。控件将传递给循环或开关块之后的语句。
在第一个例子中,当i的值为3时,执行break语句,这导致循环的执行被终止。
例
int[] array = { 1, 2, 3, 4, 5 };
for (int i = 0; i < array.Length; i++)
{
if(i == 3)
{
break;
}
Console.WriteLine("Item on index {0} is {1}", i, array[i]);
}
输出:
> Item on index 0 is 1
> Item on index 1 is 2
> Item on index 2 is 3
在第二个示例中,每个案例的末尾都包含一个break语句。这将执行案例中的语句,而不会继续下一个案例。如果没有break语句,程序将继续执行下一个案例,并且不会按预期运行。
例
switch (exampleVariable)
{
case 1:
Console.WriteLine("case 1");
Console.WriteLine("This only shows in example 1");
break;
case 2:
Console.WriteLine("case 2");
Console.WriteLine("This only shows in example 2");
Console.WriteLine("This also only shows in example 2");
break;
Console.WriteLine("This would not show anywhere, as it is after the break line and before the next case");
default:
Console.WriteLine("default");
Console.WriteLine("This only shows in the Default Example");
break;
}
输出:
> case 1
> This only shows in example 1
>
> case 2
> This only shows in example 2
> This also only shows in example 2
>
> default
> This only shows in the Default Example
>