Unit 2: Variables and Properties

Front

What is a variable in programming?

Back

A variable is a symbolic name associated with a value and whose associated value may be changed.

Front

What does the command 'c = Circle(200, 300, 20)' do?

Back

It creates a circle object 'c' with a center at (200, 300) and a radius of 20.

Front

How do you change the center of a circle in programming?

Back

You can change the center of a circle by assigning new values to its centerX and centerY properties.

Front

What is the purpose of using variables?

Back

Variables are used to store data values that can be changed and manipulated throughout a program.

Front

What happens when you click the mouse in the given code?

Back

An error will occur because the code does not specify what action to take upon a mouse click.

Front

What is the output of 'c.centerX = 150' if 'c' is a circle at (200, 300)?

Back

The center of the circle 'c' will move to (150, 300).

Front

What is the difference between a variable and a constant?

Back

A variable can change its value, while a constant remains the same throughout the program.

Front

What does 'change the opacity of a shape' mean?

Back

It refers to altering the transparency level of a shape, making it more or less visible.

Front

How many variables are shown in the code 'x = 5; y = 10;'?

Back

There are 2 variables: x and y.

Front

In programming, what does 'parameters in a function definition' refer to?

Back

Parameters are the variables listed as part of a function's definition that accept values when the function is called.