JAVA For迴圈增強

For迴圈增強結構

for(宣告語句：表示式)
{
    //程式碼語句
}

for05

package JAVASE.struct;

public class for05 {
    public static void main(String[] args) {
        int[] numbers = {10,20,30,40,50};//定義了一個數組

        for (int i = 0; i < 5; i++) {
            System.out.println(numbers[i]);
        }
        System.out.println("============");
        //簡化上述for迴圈
        for (int x:numbers){
            System.out.println(x);
        }
    }
}

 

JAVA break and continue

break

package JAVASE.struct;

public class break0 {
    public static void main(String[] args) {
        int i = 0;
        while (i<100){
            i++;
            System.out.println(i);
            if (i==30){
                break;//用於退出迴圈
            }
        }
    }
}

 

continue

package JAVASE.struct;

public class continue0 {
    public static void main(String[] args) {
        int i = 0;
        while (i<100){
            i++;
            if (i%10==0){
                System.out.println();
                continue;//用於跳過指定步驟
            }
            System.out.print(i+"\t");
        }
    }
}

 

2021.8.10