Excel: Add Comma or Custom Character to End of Each Cell (Automatic Formula for Hundreds of Values)

Hello.
How do I add any character (e.g. a comma) to the end of each cell? I mean the automatic formula for several hundred values.
Thank you in advance.

I would approach the topic in two ways:

- display formatting - set a custom format for the cell, and enter as the type: @ "," - of course, there can be anything else in quotation marks instead of a comma
- a function that connects text - assuming column A are your values - in cell B1 you create a function: CONCATENATE (A1, ",") - then you extend the function from cell B1 to the rest of column B. You hide column A and get the result you expect (with the difficulty that any editing of values must still be done in column A).