If you need a listing of the letters of the alphabet you can combine a couple of functions to provide the list.

In the image below you can see the CHAR function has been combined with the SEQUENCE function to provide a list of letters.

The formula in cell A1 is.

=CHAR(SEQUENCE(26,1,97))

This single formula spills down to list the 26 letters.

The CHAR function allows us to refer to characters using a code number. The lowercase letters start at code number 97 and the uppercase start at 65.

The SEQUENCE function allows us to create a list of sequential numbers. In this case 26 numbers that start at 97.

If you wanted a list of uppercase letters, you need to make a slight adjustment – see the image below.

The formula in cell B1 is.

=CHAR(SEQUENCE(26,1,65))

If you needed the listing horizontally see the images below.

The formula in cell C1 is.

=CHAR(SEQUENCE(1,26,97))

The formula in cell C2 is.

=CHAR(SEQUENCE(1,26,65))