5 More conditions

5.1 Boolean Type

In computer science, the Boolean data type is a data type that has one of two possible values which is intended to represent the two truth values of logic and Boolean algebra.

5.2 Scratch Boolean blocks

There sre some base boolean blocks in scratch you already know how to use

5.3 Boolean operation blocks

Below is the boolean operation blocks

5.3.1 And

for And block, must be both side is true, the block value is true:

We could make note of above blocks as express:

  (55 > 50) And (56 > 50) => (True) And (True) = True
  (55 > 50) And (49 > 50) => (True) And (False) = False
  (45 > 50) And (49 > 50) => (False) And (False) =False

5.3.2 Or

For the OR, any one side is true, the block value is true

 (55 > 50) OR (56 > 50) => True OR True = True
 (55 > 50) OR (49 > 50) => True OR False = False
 (45 > 50) OR (49 > 50) => False OR False = False

5.3.3 Not

For the Not, it will reverse the value, if Not(True) = False

Not (55 > 50) => Not True = False
Not (45 > 50) => Not False = True

5.4 Boolean Practice project

• please remix the project and completed below
• 1. Click the red ball or green ball to hide it.
• 1. if green ball touch green bar got 1 p
• 1. if green ball touch red bar lose 1 p
• 1. Red ball touch red ball got 1p
• 1. Red touch green ball to lose 1point
• 1. Any ball touch yellow bar will lost 1 p
• 1. Any ball touch purple bar will got 1p

5.5 example of Boolean

Shark demo https://scratch.mit.edu/projects/432203048