CodeHS review
Circle commands to draw other shapes or arc and half
circles
180
circle(10, 360, 3)
# of sides
radius
Amount of
circle drawn
circle(10, 180) will draw a half circle
270
90
360
circle (20, 90) will draw an arc
To make circles next to each other that don’t overlap
circle(50)
forward(100)
circle(50)
The distance
you move must
be twice the
radius of the
circle
Tracy will start
the circle at
the bottom
middle
The GRID
Tracy always starts out facing to the
left and moves to the right.
Speed
When to use the == versus the = sign
Tell the code what the variable equals
Tell the code what the variable needs to equal
before it will run the code
The code won’t work correctly with the wrong symbol
Causes the code to
do this
It should look like
this
Comments
When you need one line
of comments
When you need multiple
lines of comments
Color
The color must be in quotation
marks
The color code line must be
above the command
Common mistakes with color and fill
If you forget the end_fill() it
won’t color the circle
Common mistakes with functions
Indenting code - loops and functions must be indented and have :
after the first line of code
If you use a loop
inside a function
it must be
double indented
Conditions in loops and functions
This is called the condition, it is
tell the while statement when to
run
Common mistakes with If/Else
Proper way to write your code
Variables first
Defining functions next
Actual code that you want
the program to run
How to make things happen on certain repeats of the loop
This is basically saying to do the
commands on the even repeats
only
0
1
0
This is basically saying to do the
commands on the odd repeats
only
2
1
3
2
4
3
5
4
5
Repeats continue
0
This is basically saying to do the
commands on the 3rd repeats
only
1
2
3
4
5