Welcome to level 16! ### Welcome to level 16! By the end of this lesson: * you can make a while loop. * you have finished all of Hedy! <aside class="notes"></aside>

A new loop ### A new loop With the while keyword you can make a new loop. It will run the loop as long as the statement is true. <iframe class="fragment" src="/render_code/16?code=temperature%20%3D%2015%0Awhile%20temperature%20%3C%2025%3A%0A%20%20%20%20print%20%28%27It%20is%20%27%2C%20temperature%2C%20%27%20degrees.%27%29%0A%20%20%20%20print%20%28%27You%20cannot%20go%20outside%20without%20a%20jacket.%27%29%0A%20%20%20%20temperature%20%3D%20temperature%20%2B%202%0Aprint%20%28%27It%20is%20%27%2C%20temperature%2C%20%27%20degrees.%20Now%20you%20can%20go%20outside%20without%20a%20jacket.%27%29"></iframe> <aside class="notes">Ask your students to predict what the output of this code is going to be. For which temperature will it print that you can go outside without a jacket? Show what happens to if they are correct. Then, ask your students what happens if you remove the line 'temperature = temperature + 2'. Show them that this will result in a endless loop because the temperature always stays below 25.</aside>

while and input ### while and input You can also combine the while keyword with asking a question. <iframe class="fragment" src="/render_code/16?code=while%20answer%20%21%3D%20Hedy%3A%0A%20%20%20%20answer%20%3D%20input%20%28%27What%20is%20my%20name%3F%27%29%0Aprint%20%28%27You%20are%20correct.%20Nice%20to%20meet%20you.%20I%20am%20Hedy%21%27%29"></iframe> <aside class="notes">Ask your students again to predict the outcome. How many times will you get asked the question? Show them that the question will be asked until you gave the correct answer, namely 'Hedy'.</aside>

Debugging ### Debugging Let's debug this code! <iframe class="fragment" src="/render_code/16?code=print%20%28%27We%20will%20now%20make%20an%20improved%20version%20of%20the%20calculation%20tool.%20%27%29%0A%0Adef%20check_answer%20question%2C%20correct_answer%0A%20%20%20%20while%20answer_given%20%21%3D%20correct%20answer%0A%20%20%20%20answer_given%20%3D%20input%20%28%27What%20is%20%27%20question%20%27%3F%27%20%29%0A%20%20%20%20%20%20%20%20play%20C2%0A%20%20%20%20%20%20%20%20print%20%28Incorrect.%20Try%20again%21%29%0A%0A%20%20%20%20%20%20%20%20print%20%28Well%20done%2C%20you%20gave%20the%20correct%20answer.%29%0A%20%20%20%20play%20C5%0A%0A%0A%C3%A7heck_answer%203%2B9%2C%2012%0Acheck%20answer%20%287%2A8%2C%2056%29"></iframe> <aside class="notes">Debug this code together.</aside>

Let's check out the adventures! ### Let's check out the adventures! Enjoy the adventures in level 16! <aside class="notes">Your students can now work on all the adventures in level 16.</aside>

Let's review! ### Let's review! What did you learn today? <aside class="notes">Ask the students to list what they've learned today.</aside>

Let's review! ### Let's review! Which adventure did you like best? Why? Which adventure did you like least? Why? <aside class="notes">Ask the students for their opinion.</aside>

Show and tell! ### Show and tell! Would anyone like to show the class a program they've made? <aside class="notes">Let some students show their work to the class.</aside>

Sneak peek into your future... ### Sneak peek into your future... This was the last level. But that does not mean you have to stop programming now. You have learned a lot and you can make a lot of interesting programs with it. What would you like to program yourself? <aside class="notes">Let your students discuss what things would like to program in the future. Encourage them to do so!</aside>