Scratch%20Programming

1
Scratch Programming

• Session 6 of 10
• If-then-else statements
• interactions
• Final projects specifications

2
Objectives for Session 6

• If Statement
• If Else Statement
• Interaction

3
If Statement

• If you are 12, raise your hand
• If you like baseball, stand up

4
If Statement Programming View

• If ( you are 12)
• raise your hand
• If ( you like baseball)
• stand up

5
If Statement Scratch View

• The If Statement
• Located in the Control Menu

True or false test
Statements to do only if test is true
6
If Statement Practice

• Lets create an If Statement
• Create a variable A
• Set A to 0
• Create an If Statement
• If A gt 2
• Perform some Motion
• Change A to 3

7
If Statement Practice

• Try creating the following If Statement on your
  own
• If ( A B )
• Move 5 steps

8
If Else Statement

• If you like football, raise your hand
• Else stand up
• If you are 11, go to the right side of the room
• Else go to the left side of the room

9
If Else Statement

• If ( you are 11 )
• raise your hand
• Else
• stand up

10
If Else Statement Practice

• Loop forever
• If the mouse is clicked
• Move 10 steps
• Else
• Turn 15 degrees

11
If Else Statement Practice

• Create your own If Else Statement

12
Interaction

• Between two Sprites
• Examples
• When two Sprites are touching
• When one Sprite is clicked by mouse

13
Interaction Example

• Start with a blank screen
• Create another Sprite
• Make sure your cat is facing the first Sprite

14
Interaction Example cont.

• Add this in for the cat
• When space bar clicked
• If touching Sprite2
• Say hello
• Else
• Move 10 steps

15
Interaction Example cont.

• Add this in for the second Sprite
• When space bar clicked
• If touching Sprite1
• Say Im standing here

16
Interaction Practice

• Create your own example
• Using Two or Three Sprites
• Use touching

17
Review

• You now know
• How to create an If Statement
• How to create an If Else Statement
• How to sense touching other Sprites

18
Final Project

• Create a story, a lesson, a game, or a simulation
• Use at least two sprites that interact in some
  way
• Use at least two scenes and backgrounds
• Use some sound and motion
• Have some properties change, such as size or
  color, or shape