Lesson Objective: Learn to test a user's app entries and send a custom error message when an invalid entry is used.
Estimated Time: ~7 Minutes
Description:
- Test a user's entry in an app interface element with an expression
- Customize an error message to relay to the end user if an invalid entry in the app interface is used
- Challenge yourself with a quiz!
Recommended Follow-Up Training: Using List Boxes, Entering Free-Form Text
