Calculation with comma separated values in a cell

[lind33]

I have an example ordered comma separated list in a cell. Values are comma separated. they can be 1 digit or 2 digits.

Book2.xlsx

I'm trying to get the difference between the first value and the last value, and add 1 to the result. This is what I tried to do:

B2: = (RIGHT(A2,1)-LEFT(A2,1))+1

This works fine if all the values are single digit, but if the last value is two digits, then it doesn't give the correct result.

Is there a better way of writing this formula which works fine both for single and double digits? please. thanks

On the link to excel file above, there are some data and expected results, and how the expected results obtained.

 

[lind33]

@lind33
Mind you The other formula should be some thing like

=IFERROR((IF(LEFT(RIGHT(A1,SEARCH(",",A1)),1)=",",RIGHT(A1,SEARCH(",",A1)-1),RIGHT(A1,SEARCH(",",A1)))-LEFT(A1,SEARCH(",",A1)-1))+1,0)

yes, thanks. that works too.

 

[Peter_SSs]

Is there a better way of writing this formula which works fine both for single and double digits?

What about ..

lind33.xlsm
	A	B	C
1	DATA		EXPTECTED RESULT
2	1,3,7,10		10
3	10,10		1
4	1,4,9		9
5			0
6	1,5		5
7	4,5		2
8	3,7,8		6
Sheet1

Cell Formulas
Range	Formula
C2:C8	C2	=IF(A2="",0,RIGHT(SUBSTITUTE(A2,",",REPT(" ",20)),20)-LEFT(A2,FIND(",",A2&",")-1)+1)