Excel : Data Validation, how to force the user to enter a string that is 2 char long?

Question

I would like to add some data validation on a cell in the latest Excel. I would like to force the user to enter a string that is two-char long, with the first char a digit,

Answer 1

Select range, then in the Data menu, choose Validation.
Allow: choose Text length, Minimum = 2, maximum = 2