Unit 3: Variables Checkpoint Quiz

What’s the difference between a constant and a variable?

• A constant has a value that doesn’t change, and a variable has a value that may change.

• A variable has a value that doesn’t change, and a constant has a value that may change.

• A variable is only used in Algebra, and a constant is used in all math.

• I'm not sure

A boolean data type has only two values:

• right or affirmative

• true or false

• false or wrong

• yes or righty-0

There are several different data types used in computer programming. We have already used two of these types:

• Integer and String

• String and Core

• Core and Python

• Data and Core

True or False? Booleans are useful in programming for decision-making.

• True

• False

Which of the following statements are false about variable names:

• They must always be in capital letters
• They should be descriptive
• They should not start with numbers or contain spaces
• They point to memory locations

Examples of Booleans in daily life:

• Lights: On or Off

• Time: AM or PM

• Weather: Raining or Not Raining

• All of the above

True or false: You can only use the default variable names provided in the Variables toolbox drawer.

• True

• False

• It depends the variable type.