=if(A1<1,"",if(A1<=9,"a",if(A1<=15,"b",if(A1<=20,"c","d"))))
you can nest 7 deep.
You can also explore a lookup table using vlookup.
in C22

26
1 a
10 b
15 c
21 d
43 e
=if(Or(A1<1,A1="",istext(A1),"",VLOOKUP(A1,$C$22:$D$26,2,TRUE))
--
Regards,
Tom Ogilvy
"dba" wrote:
> In creating a price list, I am looking for a way for a cell to read another
> cell and determine if the number in that cell is between one number and
> another. Depending on the range, I want to assign that cell a letter. For
> ex:
>
> if A1 is between 1 and 9, then cell C1 would = a, but if it is between 10
> and 15, then cell C1 would = b, but if it is between 16 and 20, then cell C1
> would = c, etc. etc.
>
> Can anyone help me with this?
> --
> dba
> one day at a time