Hour 6. Working with Functions
Functions are at the heart of a well-organized script, making code easy to read and reuse. No large project would be manageable without them. Throughout this hour, we will investigate functions and demonstrate some of the ways in which they can save you from repetitive work. In this hour, you will learn
How to define and call functions
How to pass values to functions and receive values in return
How to call a function dynamically using a string stored in a variable
How to access global variables from within a function
How to give a function a "memory"
How to pass data to functions by reference
How to create anonymous functions
How to verify that a function exists before calling it
