Question

In this program, the inner loop generates random numbers out of 100 and
then stops generating them when
the random number is 7. The outer loop repeats the inner loop 100 times.
why doesn’t my outer loop keep redoing the inner loop?
It seems like it only did it once.

package test;


public class Loops {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int i = 0;
        int sum = 0;
        int counter = 0;
        String randomNumberList = " ";
        int c = 0;
        while (c != 100){

            while (i != 7) {
            i = (int) (101 * Math.random());
            sum += i;
            ++counter;
            randomNumberList += " " + i;
            }
        System.out.print("\n loop repeated" + counter+ " times and generated these numbers: " + randomNumberList);
            ++c;
        }

    }

}

Answer 1

The inner loop runs until i = 7. After it finishes, i is still 7, so it won’t run again until you change i to some other value.

If you change it to a do – while loop, it should clear up the problem.