In order to apply recursion and decisions we will think of a hypothetical scenario:

When we drive a car we need the car to have fuel in order for the car to move. The more we drive the car, the more fuel we use and the less fuel is left. When we are reaching empty,

Imagine that our robot is powered by, like most vehicles, fuel. We will impliment the following:

1) By using recursion we can simulate fuel being used when the robot moves

2) A decision (If statement) will alert us when the fuel is reaching critical levels by speech

3) A decision (if statement) will let us know that the fuel has finished by speech and also stop the robot.

Have a look at the code here on how to do this. Follow the instructions inside to write the code, or simply copy paste it. Also feel free to change the numbers and the code to make the robot do things you want it to.

Another example which focuses on decision making is the following.

In this project, we will ask the user how many beers the robot has had to drink. If the user enters a number is 2 or more (the rough legal limit in the UK) then the robot will move backwards. It will also say that it has lost its sense of direction. If the number of pints is less than 2, then the robot will move forward and say that I am still able to go straight line.

Have a look at the code here. Follow the instructions inside to write the code, or simply copy paste it. Also feel free to change the numbers and the code to make the robot do things you want it to.