Bash Shell Scripting- Scope of the Variables (Global and Local Variables), Returning a variable value

The video tutorial covers the concepts of variable scope in shell scripts, focusing on global and local variables. It explains how to define and call functions, and the differences between global and local variables. The tutorial also demonstrates how to modify variable scope using the local keyword and how to return values from functions using ECHO and return commands.

What are the two types of variables in shell scripting functions?

Explain the difference between global and local variables in shell scripts.

What must be done to execute a function after defining it in a shell script?

How can you access a variable defined outside of a function within that function?

How does the scope of a variable defined with the local keyword differ from a global variable?

What happens if you define a variable as local inside a function?

What will happen if you try to access a local variable outside its function?

Describe how to return a variable value from a function using the ECHO command.

What is the purpose of the return command in a shell function?

Why is it recommended to use ECHO instead of return for returning values from functions?