1. Decision Statements

2. Control Stuctures Sequential Processing
Do In Order
Do Together
If / Else Statements  Decisions
Repetition  Looping

3. If / Else Statements
Make a decision based on the value of a condition (at Runtime)
If a condition is True
Do “A”
Else (meaning the condition is false)
Do Nothing
Do “B”
Race Car Simulator
If the car stays on the road, add points to total
Else If the car runs off the road, the car explodes
If the car crosses the finish line, add bonus points, player wins, display total
Else, game over, player loses

4. Boolean Functions
Functions returning a Boolean Value are often used in Decision Statements
If the function returns a True Value
Do “A”
If the function returns a False Value
Do Nothing
Do “B”

5. Relational Operators Used in Expressions for If Statements == Equal To
!= Not Equal To
< Less Than
> Greater Than
<= Less Than or Equal To
>= Greater Than or Equal To
These will evaluate out to a boolean condition  either True or False

6. Compound Conditions
Compound Conditions can be used in the If Statements
Logical Operators
And Or
Not
And  Both conditions Must be true for a true condition
Or  Either condition can be true for a true condition
Not  the first condition must be true while the 2nd condition must be false

7. Example
Problem 6-2, #11
Write a vocabulary builder to help someone learn the Spanish word for Cat (gato). 3 Spanish words are displayed, if the user clicks on the correct word have the cat say “Si, Si”, if the user clicks on one of the other words have the cat shake it’s head back and forth

8. World Creation

9. Boolean Function
Write a function (isGato) that returns true if the word “gato” is clicked and returns false otherwise.
Parameter –
objectClicked – the 3D word clicked by the user

10. isGato Function

11. checkAnswer Method
Event Handling Method
Compound Condition

12. Link Method to Event

13. Homework
Chapter 6-2
Problems
13, 14, & 16