Welcome to level 6 ### Welcome to level 6 By the end of this lesson, you can: * use `elif` to add a third option to the conditionals * use `in` to check if an item is on a list or not <aside class="notes"></aside>

Let's revise if and else ### Let's revise if and else Can you think of a code with `if` and `else`? <iframe class="fragment" src="/render_code/6?code=pizza%20is%20ask%20%27What%20is%20your%20favorite%3F%27%0Aif%20pizza%20is%20pepperoni%0Aprint%20%27Yeah%21%20Pepperoni%20is%20the%20best%21%27%0Aelse%0Aprint%20%27Pepperoni%20is%20better%21%27"></iframe> <aside class="notes">Let the students work together to make up a code that contains an if and an else. When they are done, show them the example code and let them predict what the outcome will be. Also remind them that the part after the if statement is called the conditional.</aside>

Using multiple lines ### Using multiple lines Conditionals are the part after the if or else. The conditionals should be placed on the next line from now on. <iframe class="fragment" src="/render_code/6?code=tidy%20is%20ask%20%27Do%20you%20want%20your%20code%20to%20look%20nice%20and%20tidy%3F%27%0Aif%20tidy%20is%20%27yes%27%0Aprint%20%27Great%20news%21%20You%20should%20always%20put%20the%20conditional%20on%20the%20second%20line%21%27%0Aelse%0Aprint%20%27Too%20bad%21%20You%20should%20put%20your%20conditional%20on%20the%20next%20line%20anyway%21%27"></iframe> <aside class="notes">If your students have a hard time understanding why they should put their conditionals on the next line, you could tell them that in the next level they'll learn to put multiple lines of code after an if or an else. </aside>

`elif` ### `elif` `elif` is a combination of the keywords `else` and `if` and you need it when you want to make 3 (or more!) options. <iframe class="fragment" src="/render_code/6?code=pizza%20is%20ask%20%27What%20is%20your%20favorite%3F%27%0Aif%20pizza%20is%20pepperoni%0Aprint%20%27Yeah%21%20Pepperoni%20is%20the%20best%21%27%0Aelif%20pizza%20is%20hawaii%0Aprint%20%27Are%20you%20mad%3F%21%20Hawaii%20is%20the%20worst%21%27%0Aelse%0Aprint%20%27Pepperoni%20is%20better%21%27"></iframe> <aside class="notes">Show this code to your students and let them predict the 3 possible outcomes. Then let them think of their own ideas for a code with 3 or more options.</aside>

`in` ### `in` If you have practised with the `if`, `else` and elif keywords, you can also try the `in` keyword. <iframe class="fragment" src="/render_code/6?code=pretty_colors%20is%20green%2C%20yellow%0Afavorite_color%20is%20ask%20%27What%20is%20your%20favorite%20color%3F%27%0Aif%20favorite_color%20in%20pretty_colors%20print%20%27pretty%21%27%0Aelse%20print%20%27meh%27"></iframe> <aside class="notes">With `in` you can let the computer check if an item is in a list. Show the example. Please note that Hedy is case sensitive. This means that if you answer "Green" instead of "green", Hedy will print "meh".</aside>

Keeping your code clean ### Keeping your code clean Now that you are getting to know more and more codes, your programs will be getting longer. Sometimes your codes will be messy and hard to read. To make your code nice and readable you can add comments in your code using a hashtag at the start of the line like this: <iframe class="fragment" src="/render_code/6?code=%23%20Naming%20the%20character%0Aname%20is%20ask%20%27What%20will%20your%20character%20be%20called%3F%27%0Aprint%20%27They%20are%20called%20%27%20name%0A%0A%23%20Throwing%20the%20dice%0Anumbers%20%3D%201%2C%202%2C%203%0Athrow%20%3D%20numbers%20at%20random%0A%0A%23%20Assigning%20the%20pet%0Aif%20throw%20is%201%0A%20%20%20%20print%20name%20%27%20gets%20a%20dog%27%0Aelif%20throw%20is%202%0A%20%20%20%20print%20name%20%27%20gets%20a%20cat%27%0Aelse%0A%20%20%20%20print%20name%20%27gets%20a%20parrot%27"></iframe> <aside class="notes"></aside>

Debugging ### Debugging Let's debug this code! <iframe class="fragment" src="/render_code/6?code=print%20%27Welcome%20to%20the%20Icecream%20shop.%27%0Aflavour%20is%20ask%20%27Which%20flavour%20would%20you%20like%3F%27%0Aif%20flavour%20strawberry%0Aprint%20%27Good%20choice%21%27%0Aflavour%20is%20vanilla%0Aprint%20%27Are%20you%20sure%20you%20don%27t%20want%20strawberry%3F%27%27%0Aelse%0Aprint%20I%20am%20sorry%2C%20we%20only%20have%20vanilla%20and%20strawberry.%0Ascoops%20is%20%27How%20many%20scoops%20would%20you%20like%3F%27%0Aif%20scoops%20is%201%0Aprint%20that%20will%20be%201.50%2C%20please.%0Aelif%20is%202%0Aprint%20%27that%20will%20be%202.50%2C%20please.%27%0Aelse%20%27sorry%2C%20that%20is%20too%20much.%27"></iframe> <aside class="notes"></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>

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>

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 the next level... ### Sneak peek into the next level... In the next level you'll learn how to use maths in Hedy <aside class="notes"></aside>