Narrated by Horst
draw_tree(225, 35) draw_tree(420, 45) draw_house(720, 60) draw_snow_person(300, 20)
How to use variables (this chapter)
How to write expressions (this chapter)
How to create our own functions (the next two chapters)
temperature_in_celsius
tree_position_1
tree_position_2
car_speed
number_of_children
simpson
temperatueInCelsius - Uses capital letters. Keep it lower case and use underscores.
x - Too short, and not descriptive.
Smith - Starts with a capital letter.
tree position - Can’t use spaces
4runner - Can’t start with a number
Variables that don't change are constants
They should be in all upper-case
PI = 3.14159
SCREEN_WIDTH = 800
average = 90 + 86 + 71 + 100 + 98 / 5
average = (90 + 86 + 71 + 100 + 98) / 5
By Paul Craven