Variables Unit 3 Scratch Practice

What does a variable do?

• Triggers a script to run

• Holds on to a piece of information until the program needs to use it

• Deletes code

• Makes the script run faster

What is a variable?

• Some value (container) that stores information

• Joins 2 code blocks together

• It is data that is either true or false

• A block that code to run

Which of these would be a reason to declare a variable in your script or program?

• If you want something to run when the flag is clicked

• If you wanted to keep score

• If you wanted your hero character to move

• If you needed your script to stop sooner

What should you name your variable when you use it?

• Whatever you are feeling like

• Something silly

• Something that tells the user / programmer what it is for

• Leave it blank

How do you make your variable change amount?

• You can't

• You would use a change "variable name" block

• You just type the new number in

• You add more variables to each other

Can I use variables to make it appear that my objects are gaining or losing speed?

• Yes

• No

• Sometimes

• Huh?

How to I make it so I can see my variable value on my stage?

• You can't

• You click the box next to it in the block library

• You type it on the sprite

• You drag the code block on the stage

How can I make it so I can't see the variable value on the stage?

• You can't, it is always there

• You unclick the box next to it in the block library

• You drag it off the stage

• You put it under your sprite

Are the values that you learned about in unit 2 actually variables that Scratch has premade for you?

• Yes

• No

• Maybe

• Huh?

What is a global variable?

• A variable that can be used by any sprite at any time

• A variable that can only be used by one sprite

• A variable that is usable anywhere in the world

• A variable that has been created by another programmer