Basics of Writing Code 6 Defining a Function in Verse

You learned in Lesson 5 that a function is reusable code that provides instructions for performing an action, or for creating an output based on input.

To define a function, you need three key parts: a unique identifier, the type of information to expect as its result, and what the function will do when it's called.

How to Define a Function

Function Signatures

In Lesson 3, you saw how to declare a variable or constant by naming it and giving the type of value it will use.

A function signature works in a similar way. The function signature uses a unique identifier for the function, along with the parameters that describe the input it will need, and finally, the return type for the result, or output.

What the function actually does is defined in the code block.