Scratch Programming 2: Using Variables

What is a variable in Scratch programming?

• A type of bug in the program

• A fixed value that cannot change

• A function that performs a specific task

• A placeholder for a value that can change

How do you create a variable in Scratch?

• Click on the 'Motion' category and then click on 'Add Variable'.

• Click on the 'Variables' category and then click on 'Make a Variable'.

• Click on the 'Costumes' category and then click on 'New Variable'.

• Click on the 'Sounds' category and then click on 'Create Variable'.

What is the purpose of using variables in Scratch?

• To use up more memory

• To make the code more confusing

• To slow down the program

• To store and manipulate data in Scratch.

Can you change the value of a variable during the program execution?

• No

• Maybe

• Only if the variable is declared as constant

• Yes

What are some common types of variables used in Scratch?

• number, string, boolean

• red, blue, green

• apple, banana, orange

• cat, dog, bird

Explain the concept of variable scope in Scratch programming.

• Variable scope in Scratch programming refers to the area of the program where a variable can be used or accessed.

• Variable scope in Scratch programming refers to the color of the variable used in the program.

• Variable scope in Scratch programming refers to the size of the variable used in the program.

• Variable scope in Scratch programming refers to the speed of the variable used in the program.

How do you display the value of a variable on the screen in Scratch?

• Use the 'say' block or the 'show' block

• Use the 'print' block

• Use the 'output' block

• Use the 'write' block

What are some best practices for naming variables in Scratch?

• Use short and unclear names

• Use clear and descriptive names, use camelCase, avoid special characters or spaces

• Use special characters and emojis in the names

• Use random and confusing names

Give an example of using a variable to keep track of score in a game created in Scratch.

• Keep track of the score by writing it down on a piece of paper.

• Create a variable named 'score' and update it as the game progresses.

• Create a variable named 'points' and update it as the game progresses.

• Use a constant value to represent the score in the game.

Explain the difference between local and global variables in Scratch.

• Local variables are specific to a single sprite or script, while global variables can be accessed by any sprite or script in the project.

• Local variables are used for storing text, while global variables are used for storing numbers.

• Local variables and global variables are the same thing.

• Local variables can be accessed by any sprite or script, while global variables are specific to a single sprite or script.