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Page 4: Functions and Advanced RUR-PLE Concepts

4. Functions and Advanced RUR-PLE Concepts

Functions are crucial in RUR-PLE programming for modularizing code and enhancing reusability. We will also explore some useful advanced features provided by RUR-PLE.

4.1. Defining Custom Functions

You can encapsulate repetitive or complex sequences of actions into a single function.

# custom_function.py
def turn_right():
    turn_left()
    turn_left()
    turn_left()

def move_and_put_beeper():
    move()
    put()

turn_right()          # Call the defined function
move_and_put_beeper() # Call another function

Using functions makes your code more concise, readable, and easier to modify later.

4.2. The repeat() Function and World Configuration

RUR-PLE provides a repeat() function to perform a specific action a given number of times. It's also important to design your code so that the robot works in various world configurations.

The repeat() Function

# repeat_example.py
repeat(3): # Repeat three times
    move()
    take()

This code makes the robot move and pick up beepers three times.

Coding for Diverse Worlds

One of RUR-PLE's strengths is the ability to load world files (.wld) to test your code in different environments. Do not assume the robot always starts in the same initial conditions; instead, practice writing flexible code using conditional checks like front_is_clear() and on_beeper().

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