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Help! Fix the program so my field will be completely flat.
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Hi, I'm Bill! Let's learn a new fundamental concept: "If" statements. This is how computers make decisions.
You use "If" statements yourself everday. Before you go outside each morning, you say IF it's raining outside, I need to wear my jacket.
We can tell the zombie to check IF there's path to the left, and if he finds a path to the left, we can have him turn in that direction.
To write the code for this, let's drag out our "if" block and put a "turn left" block inside it.
Now, if we put a "move forward" block above it and a "repeat" block around everything, each time the zombie moves, he'll check if there's a path to the left and turn. The "repeat" command is critical, to check for a turn at every step.
If statements are really important in computer science. One of the first programs I wrote was a tic-tac-toe game, and there was a If statement that said IF the other person is about to win, block the spot that lets them win.
Have fun using the "if" block!