Using Conditionals in QuizMe and Making

Multiple ScreensWeek 3

Activity

• Simon Says Everyone stand up Do what you teacher says if she says

“Simon Says”

Conditionals – If Statements

• If (condition is true) then (do something)• When the conditions change,

the actions change• E.g. if Simon says “Simon says”

then do the command • E.g. if you are thirsty and you have

water, you take a drink

Conditionals- If else

• If (condition) then (do something) else (do something else)• E.g. You’re asking someone to go

to the prom. What happens if they say yes? What happens if they say no?

Flow Charts: Flow of Control

If answer is ‘yes’

THEN true

ELSE false

Condition must have a value of TRUE or FALSE

Flow of Control

If you text during class

true

false

Phone gets taken away

You keep your phone

If (you text during class)Phone gets taken away

elseKeep phone

Found under Built-in in the Control drawer if

ifelse

Conditionals in App Inventor

then do

then do

else do

true

true

false

Nested Conditionals• If (condition) then (do something)

elseif (condition#2) then (something else) else (do something else)• E.g. if I get into Stanford I’ll go

there. Elseif I get into Berkeley I’ll go there. Elseif I get into Harvey Mudd, I’ll go there.

Multiple Screens

QuizMe

ResourcesIf you have problems• Watch the YouTube video

• Read the App Inventor book on conditionals (page 259-266)• Post questions to the Technovation

Challenge Google Group

Reminder:Weekly Reflections• What did your team like about this

week?• What challenges did your team

have this week?• Anything else your team would

like to share?

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