Here is the video version, if you prefer it:
while and until loops are used for iteration, the same as for loops. However, I won’t teach you these. Why? Because, as (Ward, 2014) says, if you ever need a while loop (or an until loop), it’s a good time to move to another programming language. I agree.
I will tell you that (“Bash While Loop Examples,” n.d.) and a Google search will teach you, if you really must use them. But again, I will repeat myself: If you need to use a while or an until loop, switch to another programming language.
Thank you for reading!
References
Bash While Loop Examples. (n.d.). Retrieved February 22, 2020, from https://www.cyberciti.biz/faq/bash-while-loop/
Ward, B. (2014). How Linux Works: What Every Superuser Should Know (2nd ed.). No Starch Press. Pages 262-263