Lab 3: Conditionals and Artificial Intelligence

Jan. 27 – Jan. 31

Review-Activity 2: Brick Wall

Looping Blocks There are times when you will want blocks to

repeat. Instead of duplicating blocks and ending up with a long script that might be confusing, there are looping control blocks that you can wrap around the script you want to repeat.› “forever” – loops until the program ends. This is

basically an infinite loop as it goes on forever.› “repeat ()”- loops the specified number of times.› “repeat until < >” Repeat until the condition is

True. You will use predicate blocks which can be found in the Operator Palette

Repeat Until

Let’s look at the “repeat until” block a bit closer.

› Just like REPEAT, it will do everything inside the C- shaped block a certain number of times.

However before it starts the loop each time, it checks to see if the condition (x > 5) is true. When this is condition is true, it will not repeat again.

Creating a Guessing Game

Step 1 – Welcome Player, build Script!

Step 2 – Inform Player about their guess

Step 3 – Allow player to choose max value

Step 4 – Count number of guesses

Step 5 – Report number of guesses to player

Step 1: Welcome Player

Remember from Lab1, when we created a script for the sprite to ask our name!

Step 1: Build Script

Let’s look at our algorithm…

Step 1: Build Script

Step 2: Inform Player

We want to give the player more information if they don’t guess correctly.

Have the sprite tell the player if the secret number is bigger or smaller than the number that they guessed.

Work with your neighbor to add to your script…

Step 2: Inform your player

Remember there is more than one way to do this!

Step 3: Allow Choice of Max

Change your code so that the player choose the max value, instead of the sprite choosing a number between 1 and 10

Use this maximum number as the highest number that the sprite will choose.

Hint: Make a new variable for “max” value

Step 3: Allow choice of max

Make a variable for “max”

Step 4: Count number of guesses

Now let’s keep track of how many guesses it takes before the player guesses the right number.

You will need a new variable for this task and will need to add to it every time a guess occurs.

Step 4: Count number of guesses

Step 5: Report

When the player guesses the secret number tell them how many guesses it took, and congratulate them using their name.

Hint: Use previous variables!

Step 5: Report

Activity 3: Guessing Game 2.0

The goal of this Expanded Guessing Game (we’ll call it, version 2.0) is to make sprites that play the game smarter!› Create two sprites to play the game

Guide sprite Guesser sprite

› Create a list› Follow the 5 steps outlined in Manual 3.

***DUE: 48hrs after lab***

Activity 2: Guessing Game 2.0