Task: Learning Journal

Open your Learning Journal by clicking on the image below

Good notes will help you organise and process data and information

Task 1: Fill out your learning Journal.

Open your Learning Journal and complete the task below .

Coding loops

In computer science, a loop is a programming structure that repeats a sequence of instructions until a conditional statement is False. We are going to look at the While loop.

But first...

Click on the link above to open up edublocks

See if you can make the code using the blocks below

Now copy it into into either IDLE or Thonny by clicking on the Blocks button in the top right hand corner of the page.

Let's try doing a while loop in Edublocks

See if you can make the code using the blocks below

Now copy it into into either IDLE or Thonny by clicking on the Blocks button in the top right hand corner of the page.

Save your file as 'while_loops'

Writing a simple while loop in python

1. Create a New File and Type in the code from the image above
2. Add in this comment at the top of your code #A while loop allows us to repeat our code


3. Change the code so that is has an input asking the user if they want to quit. The loop should repeat until the user says yes.

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4. When you are finished screenshot your code into your Learning Journal



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Fix the while loop

1. What is wrong with this loop that tries to count to 10? What happens when it is run? How should it be fixed?

Fix the code

Run the code below and see if you can figure out what is being output:

Task - Rewrite the code above so that it prints out odd numbers from 1 to 21

There may be several ways for a loop to quit. Using a Boolean variable to trigger the event is a way of handling that. Here's an example:

    
Looping until the game is over or the user wants to quit"

done = False
while not done:
    quit = input("Do you want to quit? ")
    if quit == "y":
        done = True

    attack = input("Does your elf attack the dragon? ")
    if attack == "y":
        print("Bad choice, you died.")
        done = True

This isn't perfect though, because if the user says she wants to quit, the code will still ask if she wants to attack the dragon. How could you fix this?

Fix the code below

5. When you are finished screenshot your code into your Learning Journal



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Summing it all up

Lets look at the learning outcomes and decide which one best describes our current level of understanding :

Tick the one you feel is closest to your level