/*
ForExamples.java example code
AC Chapin

 */
package aaa;

public class ForExamples {

    public static void main(String[] args) {

        // counting with a while loop
        int i = 0;
        while (i < 100) {
            System.out.println(i);
            i++;
        }

        // equivalent for loop
        for (int j = 0; j < 100; j++) {
            System.out.println(j);
        }

        int count; //counter
        int initial = 0; // counter's initial value
        int bound = 10; // counter's upper bound
        int increment = 2; // how to change counter

        for (count = initial; // set up counter
                count < bound; // check counter
                count += increment) {   // update counter
            // code to repeat
            // bad idea to change 
            // bound, increment, or counter here
        }

        // equivalent
        for (int x = 0; x < 10; x += 2) {
            // whatever
        }



        // counting down by 5's from 5000 to 500
        for (int k = 5000; k >= 500; k = k - 5) {
            System.out.println(k);
        }


        // nested for loops
        for (i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                for (int k = 0; k < 3; k++) {
                    System.out.println("(" + i + ", " + j + ", " + k + ")");
                }
            }
        }


        // print numbers from 1 to 9 in a triangle
        // the outer loop tells how many rows to do
        for (i = 1; i < 10; i++) {
            // the inner loop goes across the row
            // counting up to i each time
            // so as i gets bigger, the row gets longer
            for (int j = 1; j <= i; j++) {
                // technically, j only exists within the curly braces
                // of the previous for loop it was in, so we can declare
                // j again for this for loop
                System.out.print(j + " ");
            }
            System.out.println();
        }


        /*
        // PROBLEMS WITH LOOPS
        // x moving in wrong direction
        for (int x = 0; x < 10; x--) { 
        //...
        }
        
        // using counter for input
        for (int x = 0; x < 10; x++) { 
        System.out.println("Number please?")
        x = scan.nextInt();
        
        }
        
        // moveing the goalposts
        for (int x = 0; x < y; x++) { 
        y++;
        }
         */
    }
}