Help me for exact formula

[vlook fomula]

Thanks Roger Govier the problem has been solved but let me know i had try
your given formula also as follow
=IF(COUNTIF(Sheet1!A:A,Sheet3!A2),VLOOKUP(Sheet3!A2,Sheet1!$A$2:$C$4,3,0),VLOOKUP(Sheet3!A2,Sheet2!$A$2:$C$4,3,0))
and got good result, is this application correct because it is easy and will
not creat problem in future.

thanks in advance
Zafar

 

[T. Valko]

You have the same argument defined for both the value_if_true and the
value_if_false. You probably want this:

=IF(COUNTIF(Sheet1!A:A,Sheet3!A2),VLOOKUP(Sheet3!A2,Sheet1!$A$2:$C$4,3,0),"")

If the lookup value is not found then the formula will return a blank.

 

[T. Valko]

You have the same argument defined for both the value_if_true and the
value_if_false. You probably want this:

=IF(COUNTIF(Sheet1!A:A,Sheet3!A2),VLOOKUP(Sheet3!A2,Sheet1!$A$2:$C$4,3,0),"")

If the lookup value is not found then the formula will return a blank.