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#1
August 28th, 2008, 07:50 AM
posted to microsoft.public.excel.worksheet.functions
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=SUMPRODUCT(--(TRIM(A1:A10)"")), what does the "--" mean?
Hi,
What does the "--" operator mean in the above worksheet equation? Thanks. 
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#2
August 28th, 2008, 08:00 AM
posted to microsoft.public.excel.worksheet.functions
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=SUMPRODUCT(--(TRIM(A1:A10)"")), what does the "--" mean?
Google for "double unary minus".
-- David Biddulph "Ray" wrote in message news  Hi, What does the "--" operator mean in the above worksheet equation? Thanks.
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#3
August 28th, 2008, 08:05 AM
posted to microsoft.public.excel.worksheet.functions
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=SUMPRODUCT(--(TRIM(A1:A10)"")), what does the "--" mean?
=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 news Hi, What does the "--" operator mean in the above worksheet equation? Thanks.
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