ForLoops.java

/**
 * Created by ecornell on 3/27/2015.
 */
public class ForLoops {

    public static void main(String[] args) {

        // While - (loop possibly zero times)
        int i=1;
        while (i <= 3) { // condition is checked before inner block is ran
            System.out.println("while -> " + i);
            i++;
        }

        // For - Simulate a While Loop (loop possibly zero times)
        for (int j = 1; j <= 3; j++) { // condition is checked before inner block is ran
            System.out.println("for (while) -> " + j);
        }


        // ---------

        // Do/While (loop at least one time)
        int k = 5;
        do {
            System.out.println( "do/while -> This will print once" );
            k++;
        } while (k <= 3); // condition is checked after inner block is ran

        // While - Simulate a Do/While Loop  (loop at least one time)
        boolean ranAtLeastOnce = false;
        int l = 5;
        while (ranAtLeastOnce == false ||  l <= 3) {
            System.out.println( "while (do/while) -> This will print once" );
            ranAtLeastOnce = true;
        }

        // For - Simulate a Do/While Loop (loop at least one time)
        ranAtLeastOnce = false;
        for (int m = 5 ; ranAtLeastOnce == false ||  m <= 3; m++) {
            System.out.println( "for (do/while) -> This will print once" );
            ranAtLeastOnce = true;
        }

    }
}



// Output
//
// while -> 1
// while -> 2
// while -> 3
//
// for (while) -> 1
// for (while) -> 2
// for (while) -> 3
//
// do/while -> This will print once
//
// while (do/while) -> This will print once
//
// for (do/while) -> This will print once