有人能告诉我break语句和continue语句的区别吗?


当前回答

你在一个for或while循环中。使用打破;就会把你排除在外。也就是说,它会结束。继续;将告诉它运行下一次迭代。

在if语句中使用continue没有意义,而是break;是有用的。 在开关……Case,总是用破;结束一个用例,使它不再执行另一个用例。

其他回答

下面是break的语义:

int[] a = new int[] { 1, 3, 4, 6, 7, 9, 10 };
// find 9
for(int i = 0; i < a.Length; i++)
{
    if (a[i] == 9) 
        goto goBreak;

    Console.WriteLine(a[i].ToString());      
}
goBreak:;

下面是continue的语义:

int[] a = new int[] { 1, 3, 4, 6, 7, 9, 10 };
// skip all odds
for(int i = 0; i < a.Length; i++)
{
    if (a[i] % 2 == 1) 
        goto goContinue;

    Console.WriteLine(a[i].ToString());      

goContinue:;
}

break语句跳出循环(要执行的下一个语句是右大括号之后的第一个语句),而continue语句在下一个迭代中开始循环。

简单的程序,了解继续和中断之间的区别

当使用continue时

    public static void main(String[] args) {
    System.out.println("HelloWorld");
    for (int i = 0; i < 5; i++){
        System.out.println("Start For loop i = " + i);
        if(i==2){
            System.out.println("Inside if Statement for i = "+i);
           continue;
        }
        System.out.println("End For loop i = " + i);
    }
    System.out.println("Completely out of For loop");
}


OutPut:
HelloWorld
Start For loop i = 0
End For loop i = 0
Start For loop i = 1
End For loop i = 1
Start For loop i = 2
Inside if Statement for i = 2
Start For loop i = 3
End For loop i = 3
Start For loop i = 4
End For loop i = 4
Completely out of For loop

什么时候使用break

public static void main(String[] args) {
    System.out.println("HelloWorld");
    for (int i = 0; i < 5; i++){
        System.out.println("Start For loop i = " + i);
        if(i==2){
            System.out.println("Inside if Statement for i = "+i);
           break;
        }
        System.out.println("End For loop i = " + i);
    }
    System.out.println("Completely out of For loop");
}

Output:
HelloWorld
Start For loop i = 0
End For loop i = 0
Start For loop i = 1
End For loop i = 1
Start For loop i = 2
Inside if Statement for i = 2
Completely out of For loop

Break只留下一个循环,继续跳转到下一个迭代。

for (int i = 1; i <= 3; i++) {
        if (i == 2) {

            continue;
        }
        System.out.print("[i:" + i + "]");

在netbeans中尝试这段代码,您将理解break和continue之间的区别

for (int i = 1; i <= 3; i++) {
        if (i == 2) {

            break;
        }
        System.out.print("[i:" + i + "]");