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Old August 4th 05, 05:19 AM
Ted Rogers
 
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Default Why should you never use '=sum(A1+A2)'?

I attended an Excel training course yesterday and looking through the
handout this morning noticed these lines in the overview:

'.......when to use '=A1+A2' and when to use '=sum(A1:A10)' and why you
should never use '=sum(A1+A2)'. I can't for the life of me remember the
trainer's explanation and can't find the answer anywhere. Could anyone help
please?

Ted



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Old August 4th 05, 05:43 AM
JE McGimpsey
 
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The SUM() function is superfluous in this case. Example:

A1: 5
A2: 6
A3: =A1 + A2 ==== 11
A4: =SUM(A1 + A2) === SUM(11) ==== 11


In article ,
"Ted Rogers" wrote:

I attended an Excel training course yesterday and looking through the
handout this morning noticed these lines in the overview:

'.......when to use '=A1+A2' and when to use '=sum(A1:A10)' and why you
should never use '=sum(A1+A2)'. I can't for the life of me remember the
trainer's explanation and can't find the answer anywhere. Could anyone help
please?

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Old August 4th 05, 09:55 AM
Bob Phillips
 
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Because you are effectively trying to do the same command twice

A1+A2 is summing those two cells,
SUM is also saying to sum them

You get the correct answer because the A1+A2 is resolved before the SUM acts
upon it, but it is unnecessary, and will be inefficient in a large
spreadsheet.

--
HTH

Bob Phillips

"Ted Rogers" wrote in message
...
I attended an Excel training course yesterday and looking through the
handout this morning noticed these lines in the overview:

'.......when to use '=A1+A2' and when to use '=sum(A1:A10)' and why you
should never use '=sum(A1+A2)'. I can't for the life of me remember the
trainer's explanation and can't find the answer anywhere. Could anyone

help
please?

Ted




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Old August 4th 05, 01:56 PM
Dave Peterson
 
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=sum() ignores cells with text in them:

A1: ASDF
A2: 3

=sum(a1:a2) will return 3
=sum(a1+a2) will return a #value! error
(because a1+a2 will return a #value! error)


Ted Rogers wrote:

I attended an Excel training course yesterday and looking through the
handout this morning noticed these lines in the overview:

'.......when to use '=A1+A2' and when to use '=sum(A1:A10)' and why you
should never use '=sum(A1+A2)'. I can't for the life of me remember the
trainer's explanation and can't find the answer anywhere. Could anyone help
please?

Ted


--

Dave Peterson
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Old August 4th 05, 07:13 PM
Ted Rogers
 
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"Dave Peterson" wrote in message
...
=sum() ignores cells with text in them:

A1: ASDF
A2: 3

=sum(a1:a2) will return 3
=sum(a1+a2) will return a #value! error
(because a1+a2 will return a #value! error)

Many thanks to everyone for your kind help - I appreciate it.

Ted




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