It's for consistency's sake, reducing confusing and using certain shell features. Hit the subscribe button to receive more videos like this! REFERENCE LINKS --------------------------------------------------- ► COURSES --------------------------------------------------- Courses I've created that focus on web dev and deployment topics. ► THE TOOLS I USE / GEAR --------------------------------------------------- ► FOLLOW ME ELSEWHERE --------------------------------------------------- ► Twitter: ► GitHub: TIMESTAMPS --------------------------------------------------- 0:00 -- Intro 0:07 -- Quoting your variables is important too 0:44 -- Taking a look at an example script that demos a few use cases 0:54 -- Defining a default value 1:46 -- Help visualize what is part of a variable or a string 2:12 -- Clearly separating variables when an underscore is involved 3:04 -- Truncating a variable's output in Bash 3:59 -- Reference a specific index in an array 4:45 -- Being able to reference more than 9 command line arguments 5:39 -- Shellcheck will call out when you're not using braces