Methods and Functions

Question 1

Check if the right keyboard arrow has been pressed

Answer 1

if (Greenfoot.isKeyDown(“Right”))
{

}

Question 2

Make an object point right

Answer 2

setRotation (0);

Question 3

Make an object point down

Answer 3

setRotation (90);

Question 4

Make an object point left

Answer 4

setRotation (180);

Question 5

Make an object move forward 1 space

Answer 5

move (1);

Question 6

Make an object point up

Answer 6

setRotation (270);

Question 7

play a sound file called “pop.wav”

Answer 7

Greenfoot.playSound (“pop.wav”)

Question 8

Generate a random number between 0-100

Answer 8

Greenfoot.getRandomNumber (100);

Question 9

Return a true / false value when an object is at the edge of the world

Answer 9

if (isAtEdge())
{
returnFalse
}

Question 10

Make an object turn 45 degrees

Answer 10

turn (45);

Question 11

Return true or false if the object is touching another (e.g. touching an object of a class called “Snake.class”)

Answer 11

if (isTouching(Snake.class))
{

}

Question 12

Remove an object from the game world that the object is touching (for example, Heart.class)

Answer 12

removeTouching(Heart.class);

Question 13

Stop code

Answer 13

Greenfoot.stop();

Question 14

Add 1 to the counter from another character

Answer 14

Counter counter = (Counter)getWorld().getObjects(Counter.class.get(0));
counter.add(1);