In the “Using Vernier Sensors with Arduino®“ activity, you started with the sensor reading (the count) from the Arduino and converted that to a voltage. In this activity you will complete the process by creating an equation to convert the voltage to an actual sensor reading.

Functions are groups of code that can be “called” to run within a program. As demonstrated before, they help organize code so that it is easy to understand. Functions are efficient, as they can be created once and then called within your code as needed—or even copied and included in another sketch. 

You have used functions in previous activities: “setup()” and “loop()”. In this activity you will create functions and learn how to “call” them from other areas of your code.