If we have a Single number/text box question type, it is possible to validate it to only accept Numbers (in
a certain range) or to make sure that the format is an email address, etc.
1. After adding the question and selecting the question type, we go to the Validation tab, found under
the Question text/Answer options:
2. You will be provided with multiple validation options for the textbox questions, where you can also
add the specifics within the validation – ex. Must be a number
3. You can also add the Invalid format error message and change it to be more descriptive if there is an issue.