package Likefr;

public class DemoMain {
    public static void main(String [] args){
    int arr[]={1,2,3};
    String s="[";
    String s1;
        for(int i=0;i<arr.length;i++) {
            if (i == arr.length - 1) {
                s = s + arr[i] + "]";   // i<2
            }else{
                s = s + arr[i] + ", ";
            }
        }
        System.out.print(s);
    }
}


//[1,
//[1,2
//[1,2,3]