Variables

Question 1

What are variables?

Answer 1

Labels you can assign to values

Question 2

How do you assign value 5 to variable num?

Answer 2

num = 5

Question 3

How do you assign values 3, 5, 8 to variables x, y, and z respectively?

Answer 3

x, y, z = 3, 5, 8

Question 4

How do you change a variable’s value?

Answer 4

Just assign a different value to that variable
name = “John”
name = “Jane”

Question 5

What are the rules for variable names?

Answer 5

• no spaces
• just letters, numbers and underscore character (_)
• can’t begin with a number
• don’t use Python keywords and function names
• keep it short and descriptive

Question 6

Does it matter if variables are lower or uppercase?

Answer 6

All variables should be lowercase and all constants should be CAPITALCASE.

Question 7

What is a constant?

Answer 7

A variable whose value stays the same throughout the life of a program.