Hi,

What does the "--" operator mean in the above worksheet equation?

Thanks.

Google for "double unary minus".
--
David Biddulph

"Ray" wrote in message
...
Hi,

What does the "--" operator mean in the above worksheet equation?

Thanks.

=SUMPRODUCT(--(TRIM(A1:A10)<""))

This portion will return an array of TRUE or FALSE:

TRIM(A1:A10)<"")

The double unary "--" coerces these logical values to numeric values which
SUMPRODUCT can then add up to arrive at the result.

--TRUE gets coerced to 1
--FALSE gets coerced to 0

Try entering these formulas and see what happens:

=--TRUE
=--FALSE

Enter the number 10 in cell A1 then try this formula:

=--(A1=10)

--
Biff
Microsoft Excel MVP


"Ray" wrote in message
...
Hi,

What does the "--" operator mean in the above worksheet equation?

Thanks.