IB Computer Science Higher Level (Year One)

This lesson introduces the run method, which is the place where the program starts running. Students will also learn to write full java programs instead of just writing commands. In the the program below, SquareKarel is the name of the class. When we say extend Karel, it means this is a Karel program like the ones we have already written.

public class SquareKarel extends Karel 
{
    public void run()
    {
        putBall();
        move();
        turnLeft();
   }