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Using Lists and Loops in Lots of Circles Week 4. Lists For example: to do list, shopping list In CS: An ordered set of values One name, multiple values,

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Presentation on theme: "Using Lists and Loops in Lots of Circles Week 4. Lists For example: to do list, shopping list In CS: An ordered set of values One name, multiple values,"— Presentation transcript:

1 Using Lists and Loops in Lots of Circles Week 4

2 Lists For example: to do list, shopping list In CS: An ordered set of values One name, multiple values, in numbered order Can get to individual items if you know their position How would this be helpful in the QuizMe Hack?

3 Loops Tell the computer to do something over and over The block of code to repeat is IN the loop. Other code is not in the loop There must be a condition for the loop to end Example: Shopping List

4 Definite Loops Foreach (member of a list): do something Automatically end at the end of the list Example: foreach (class period): go to class foreach (shopping list item): get it Automatically move to the next member of the list at the end of the commands

5 Indefinite loops While (condition is true): do something End when the condition is not true Example: While (it is raining): use an umbrella Do not move through a list, just check a condition at the end of the block of code Can use a counter to keep track Example: While (I still have tickets): give next person a ticket

6 Lots of Circles

7 Resources If you have problems Read the App Inventor book on lists and loops (page & ) Post questions to the Technovation Challenge Google Group

8 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?

9 Share with us on Twitter & Facebook Tweet #technovation Like us on Facebook: Technovation Challenge


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