nested if statements

[Guest]

I have created an IF statement which I use to search a string for the letter
"a", and "a" can appear multiple times in the string. A value of "1" is
assinged each time "a" is found. I would like to know the SUM of values for
"a".

My IF statement is:
IF(ISERR(IF(SEARCH("a",$B2)>0,1,0)),0,IF(SEARCH("a",B2)>0,1,0)).

I would like to include this condition in the above IF Statement.
IF B2>0,SUM(B2),0)

 

[willwonka]

=len(b2)-len(substitute(b2,"a",""))

 

[Guest]

I just tested this formula on a string, aaa, and it returned a value of 1...

I'm not sure what your question is here? How to sum a series of values?
How to count the total number of a's in a given string?

Dave