anyone explain me

Question

public class Program{
public static void main(String[]args){
int[][] array = {{1,2,3},{4,5,6},{7,8,9}};
for(int i = 0;i < array.length;i++){
System.out.println(i+"first"); //increment only one time
for(i = 0; i < array.length;i++){
System.out.println(i+"second"); //increment multiple time
}
}
}
}

Answer 1

I don't think you should be able to do nested loops by initializing the same variable twice. However, the first loop only prints once, because the second loop is using the variable i as well. When the second loop completes, the value of i is at the array.length, so when the first loop tries to execute again, i is already met the condition, and thus the loop closes.