In the nested loops above, how many total iterations does the innermost statement execute?

public class LoopTest {
    public static void main(String[] args) {
        int count = 0;
        for (int i = 1; i <= 4; i++) {
            for (int j = 0; j < i; j++) {
                count++;
            }
        }
        System.out.println(count);
    }
}