Break与continue

Break与continue

//break退出整个循环
//continue跳过本次尚未执行的操作

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public class BreakDemo {
    public static void main(String[] args) {
        int i = 0;
        while (i<100){
            i++;
            System.out.println(i);
            if (i==30){
                break;
            }
        }

        System.out.println("123");

    }
}

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public class ContinueDemo {
    public static void main(String[] args) {
        int i = 0;
        while (i<100){
            i++;
            if (i%10==0){
                System.out.println();
                continue;
            }
            System.out.print(i);
        }

        //break退出整个循环
        //continue跳过本次尚未执行的操作
    }
}

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ps：带标签的continue，类似于goto

public class LabelDemo {
    public static void main(String[] args) {
        //打印101-150之间所有的质数
        //质数是指在大于1的自然数中，除了1和它本身以外不再有其他因数的自然数

        int count = 0;

        // 类似goto，带标签的continue
        outer:for (int i = 101; i < 150; i++) {
            for (int j = 2;j<i/2;j++){
                if (i % j ==0){
                    continue outer;
                }
            }
            System.out.print(i+" ");
        }
    }
}