for loop won't run inside while loop java

Question

There's a while loop in my program that will loop infinitely because the for loop inside won't run twice. I want to find the number of combinations that will have a sum of 4 from input and here's my code:

Scanner scan = new Scanner(System.in);
int n = scan.nextInt();

ArrayList<Integer> taxi = new ArrayList<Integer>();
for (int i=0; i<n; i++) {
  taxi.add(scan.nextInt());
}

int i = 0;
int total=0;
int tax=0;
int num = 0;
while (num<n) {
  i=0;
  for (i=0; i<n; i++) {
    if (total+taxi.get(i)<=4) {
      total+=taxi.get(i);
      System.out.println(total);
      num++;
    }
  }
  tax++;
}
System.out.println("Taxis= " + tax);

Answer 1

looking though you're code it seems your issue lies in the usage of some of your variables such as I multiple times which causes the code to not compile. try using better names or more unique names in order to prevent these issues in future. as well as that I would also advise not zeroing all of your variables so often in such a manner. Finally your issue has to do with your usage of the variable n as it remains a fixed number which will not change in the while loop meaning it will always be true. the best way to fix this is to utilize the

break;

command to exit the while loop or to use a counted loop like a for loop. In my honest opinion i would request that when asking these questions next time check all the variables with a print line in the appropriate spot.