Join Scott Simpson for an in-depth discussion in this video Ensuring a response, part of Learning Bash Scripting.
…While it's great to ask for input, you probably…want to build some error tolerance into your script.…What happens if someone skips a prompt by just pressing Enter?…There's a few ways to deal with this pretty easily.…First, let's take a look a case where…we have a script that requires arguments to run.…So this script checks for the number of arguments.…And because it wants to have three, it won't run the program if it doesn't.…Instead, it returns a usage recommendation.…Instead of just exiting or failing somewhere along the road…when it comes time to use an argument that wasn't provided.…I'll save this, Exit,…and run the script.…
Since I haven't provided any arguments, I get the usage recommendation.…If I provide just a few arguments, the condition of having three…arguments is still not satisfied, so I get the usage recommendation again.…But if I give it three arguments, which…is what it's looking for, then the program executes.…Alternatively, we could set up a loop to not allow…the user to continue without specifying some kind of input.…
- What is Bash?
- Managing output with grep, awk, and cut
- Understanding Bash script syntax
- Creating a basic Bash script
- Displaying text with "echo"
- Working with numbers, strings, and arrays
- Reading and writing text files
- Working with loops
- Using functions
- Getting user input during execution
- Ensuring a response
Skill Level Beginner
1. Working with the Command Line
2. Building Bash Scripts
3. Control Structures
4. Interacting with the User
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