Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Questions

1. In which two ways can we define a function?
2. What are some advantages of functions?
3. What is the difference between a globally scoped variable and a locally scoped one?
4. How can we set values and attributes to variables?
5. How can a function use arguments passed to it?
6. How can we return a value from a function?
7. What does the source command do?
8. Why would we want to create a function library?