if with vlookup tricky or alternative solution

Hi Experts excel 2007

Need a formula to do the following. ..
If cell A2 is blank then leave the text currently in cell B2, otherwise if cell A2 has text,  then lookup answer from range A2:F15 sheet 2.
Who is Participating?

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Finance AnalystCommented:
Or you can use the AND function:

=IF(AND(A2="",B2=""),"",VLOOKUP(A2,Sheet2!\$A\$2:\$F\$15,2,FALSE))

Reading the question, it sounds like you want to put this formula in cell B2 but that will overwrite the contents of the cell, blank or otherwise. And referring to itself will create a circular reference.

Is that correct assumption?

Thanks
Rob H
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Commented:
Try:

=IF(A2="",B2,VLOOKUP(A2,Sheet2!\$A\$2:\$F\$15,2,FALSE))

where in the VLOOKUP you are looking for A2 value in column A of Sheet2, and then the 2 means you want to get the item from the 2nd column of range A2:F15
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Author Commented:
NBVC

Firstly many thanks excellent feedback. .just need a slight addition to the above formula if a2 is blank and also b2 is blank then leave b2 as blank then apply above. .
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Commented:
Try:

=IF(A2="",IF(B2="","",B2),VLOOKUP(A2,Sheet2!\$A\$2:\$F\$15,2,FALSE))
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Author Commented:
Hi expert's. ..

Apologies if I have made an error...
But if a2 is blank and b2 is blank then b2 is blank,  however if a2 is blank and b2 has text then b2 otherwise vlookup. .

I am getting blank when a2 is blank and b2 has text.
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Commented:
As Rob said, if you are putting the formula in B2, you will get a circular reference error (a formula can't be used to check the cell it is in).  The formula needs to be put in another cell, like C2, then my formula will work.
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Finance AnalystCommented:
As I said in my comment, you cannot refer to a cell within a formula in that cell. You will get circular reference.

Where are you putting the formula?

What are you using as a lookup to find the answer from Sheet2?

Thanks
Rob H
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Author Commented:
Hi all

Formula in cell b2 and the look up table is if a2 has text and b2 is blank.m
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Author Commented:
Hi experts....

Got it to work..realised my mistake. .

Appreciate the excellent feedback.
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Finance AnalystCommented:
Do you mind sharing what the mistake was? We may still be able to help/improve.

Rob
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Author Commented:
Hi rob

I stuck the formula in the wrong cell...circular ref.
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