C#|跳转语句（Break, Continue, Goto, Return和Throw） _C#

break声明
Continue声明
goto声明
return声明
throw声明

目录在C#中, 由于执行程序时某些指定的代码, 跳转语句用于将控制从程序中的一点转移到另一点。跳转语句中有五个关键字：
Break
Continue
【C#|跳转语句（Break, Continue, Goto, Return和Throw）】Goto
return
throw
break声明 break语句用于终止其所在的循环或语句。此后, 控件将传递到break语句之后出现的语句(如果有)。如果break语句存在于嵌套循环中, 则它仅终止那些包含break语句的循环。
流程图：

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例子：

//C# program to illustrate the //use of break statement using System; class Geeks {//Main Method static public void Main() {//lsbin is printed only 2 times //because of break statement for ( int i = 1; i < 4; i++) { if (i == 3) break ; Console.WriteLine( "lsbin" ); } } }

输出如下：

lsbin lsbin

Continue声明该语句用于在特定条件下跳过循环的执行部分。之后, 它将控制转移到循环的开始。基本上, 它跳过以下语句, 并继续循环的下一个迭代。

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例子：

//C# program to illustrate the //use of continue statement using System; class Geeks {//Main Method public static void Main() {//This will skip 4 to print for ( int i = 1; i < = 10; i++) {//if the value of i becomes 4 then //it will skip 4 and send the //transfer to the for loop and //continue with 5 if (i == 4) continue ; Console.WriteLine(i); } } }

输出如下：

1 2 3 5 6 7 8 9 10

goto声明该语句用于将控制权转移到程序中带标签的语句。标签是有效的标识符, 位于控件从其中转移的语句之前。

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例子：

//C# program to illustrate the //use of goto statement using System; class Geeks {//Main Method static public void Main() { int number = 20; switch (number) {case 5: Console.WriteLine( "case 5" ); break ; case 10: Console.WriteLine( "case 10" ); break ; case 20: Console.WriteLine( "case 20" ); //goto statement transfer //the control to case 5 goto case 5; default : Console.WriteLine( "No match found" ); break ; } } }

输出如下：

case 20 case 5

return声明该语句终止方法的执行, 并将控件返回给调用方法。它返回一个可选值。如果方法的类型为void, 则可以排除return语句。
例子：

//C# program to illustrate the //use of return statement using System; class Geeks {//creating simple addition function static int Addition( int a) {//add two value and //return the result of addition int add = a + a; //using return statement return add; }//Main Method static public void Main() { int number = 2; //calling addition function int result = Addition(number); Console.WriteLine( "The addition is {0}" , result); } }

输出如下：

The addition is 4

throw声明它用于借助以下命令创建任何有效异常类的对象新手动设置关键字。有效的异常必须从Exception类派生。
例子：

//C# Program to illustrate the use //of throw keyword using System; class Geeks {//takinmg null in the string static string sub = null ; //method to display subject name static void displaysubject( string sub1) { if (sub1== null ) throw new NullReferenceException( "Exception Message" ); }//Main Method static void Main( string [] args) {//using try catch block to //handle the Exception try {//calling the static method displaysubject(sub); }catch (Exception exp) { Console.WriteLine(exp.Message ); } }}

输出如下：