greenfoot

Question 1

what does square brackets mean

Answer 1

they are used for arrays

Question 2

what does move() mean

Answer 2

allows the classes/objects to move and the number inside the brackets dictates how far they move

Question 3

what does turn() mean

Answer 3

allows the classes to turn and the number inside the bracket dictates how far it turns

Question 4

what does if() mean

Answer 4

this works the same way an if statement does in python for example if the down key is pressed it will move down (if that’s how you have programmed it)

Question 5

how do you make your actor move at random

Answer 5

move(1;
if (greenfoot.getrandomnumber(10)<1)
{
turn(greenfoot.getrandomnumber(90)-45);
}

Question 6

how would you make it so that if your main character touches a specific actor, the specific actor will disappear

Answer 6

if(istouching(cherry.class))
{
removetouching(cherry.class);
}

Question 7

how do you add a counter to this previous piece of code

Answer 7

if(isTouching(cherry.class))
{
removetouching(cherry.class);
counter counter = (counter)getworld().getobjects(counter.class).get(0);
counter.add(1);

Question 8

what does round brackets mean

Answer 8

they are used in mathematical expressions, and to surround the parameter lists for method calls

Question 9

what does curly brackets mean

Answer 9

these are used to surround blocks of code

Question 10

what does compile mean?

Answer 10

compile combines the different classes and subclasses onto the world, we must compile the classes before we run the program otherwise it wouldn’t work, if we don’t compile the classes, they are unable to go on the world

Question 11

how do you make your actor turn at random

Answer 11

move(1);
if (Greenfoot.getrandomnumber(10)<1)