In this tutorial, I’ll show you how to combine a custom number format and data validation to force users to enter the correct number of numeric digits.

The Char function works with codes (numbers), each number you place in the formula will give a different result. See the photo above. There are two other methods to use the CHAR function in Excel.

For example, there are several ways to enter formulas and calculate numbers in Excel. 5 ways to enter formulas 1. Manually enter Excel formulas: Long Lists: =SUM (B4:B13) ...