What function would return the length of a string entered by the user in app

I have screen, where the users can enter a value. I need to count the length of the value so that I can display a conditional message sayint for example" you cannot enter more than 100 characters".

Try =LEN()

@53c27d6f-59b8-35c0-8 Combine what @AndrewB said with the concepts in these How to Add Conditional Visibility & Data Validation and Validation to input filed and you should be sailing free. :sailboat: