Displaying Positive/Negative numbers from a formula

Question

I have the following formula that looks similar to this..
(Field1) - (Field2)
when field 1 is smaller then field 2 we know that the number will be a negative and the report will print a negative sign in front of the number.
Now here is the question, say (Field1) was equal to 10, and (Field2) was equal to 9 the formula would look like
(10) - (9)
and the report would print a positive 1.   Is there anyway to format the formula to display a Positive sign in front of the number if it is positive, and a negative in front of the number if it is negative?
Thanks everyone for your help!

Answer 1

Yes, that formula works for me.  I had to slightly modify the formula because it was printing two negative signs on ther report instead of one.  I think that may have been due to how I had my number formatting options set in Crystal.
Here is the original formula:
numbervar a:=0;
a:=(Field1)-(Field2);
if a >= 0 then
"+" & (a) else " -" & (a);
Then I changed it to be:
numbervar a:=0;
a:=({@JM_ClaimAmt})-({Reconciliation_GetReport;1.UPCClaimAmt});
if a >= 0 then
// Took out the negative sign here so it would not show negative twice.
"+" & (a) else " " & (a);
It works now, I'm happy