[JAVA] for 반복문

for 반복

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        for(int i=0 ; i<10 ; i++){
            System.out.println(i);
        }
        System.out.println("done.");
    }
}

0
1
2
3
4
5
6
7
8
9
done.

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        int arr[] = {1,2,3,4,5,6,7,8,9,10};
        int sum = 0;
        for(int i=0 ; i<10 ; i++){
            sum = sum + arr[i];
        }
        System.out.println(sum);
    }
}

55

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        int arr[] = {10,20,30,40,50};

        System.out.println("for문");
        for(int i=0 ; i<5 ; i++){
            System.out.println(arr[i]);
        }
        System.out.println("");

        System.out.println("향상된 for문");
        for(int i : arr){
            System.out.println(i);
        }
    }
}

for문
10
20
30
40
50

향상된 for문
10
20
30
40
50

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        int arr[] = {10,20,30,40,50};

        for(int i=0 ; i<5 ; i++){
            System.out.println(arr[i]);
            if(i == 2)
             break;
        }
    }
}

10
20
30

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        for(int i=0 ; i<5 ; i++){
            for(int j=0 ; j<3 ; j++){
            System.out.println("(" + i + "," + j + ")");
            }
        }
    }
}

(0,0)
(0,1)
(0,2)
(1,0)
(1,1)
(1,2)
(2,0)
(2,1)
(2,2)
(3,0)
(3,1)
(3,2)
(4,0)
(4,1)
(4,2)

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        for(int i=0 ; i<5 ; i++){
            if (i == 3)
                continue;
            System.out.println(i);
        }
    }
}

0
1
2
4

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        for(int i=0 ; i<5 ; i++){
            if (i == 3) 
                continue; //i가 3이면 for문의 다음번 반복 과정을 계속함
            System.out.println(i);
        }
    }
}

0
1
2
4

 

/*for문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        outerloop:
        for(int row=0 ; row<2 ; row++){
            for(int col=0 ; col<3 ; col++){
                if((row ==1) && (col==1)) 
                    continue outerloop; //(1,1)건너뜀
                System.out.println("(" +row+ "," +col+ ")");
            }
        }
        System.out.println("done.");
    }
}

(0,0)
(0,1)
(0,2)
(1,0)
done.