[excel] Using "If cell contains #N/A" as a formula condition.

I need help on my Excel sheet. How can I declare the following IF condition properly?

if A1 = "n/a" then C1 = B1
else if A1 != "n/a" or has value(int) then C1 = A1*B1

A possible alternative approach in Excel 2010 or later versions:

AGGREGATE(6,6,A1,B1)

In AGGREGATE function the first 6 indicates PRODUCT operation and the second 6 denotes "ignore errors"

[untested]

"N/A" is not a string it is an error, try this:

=if(ISNA(A1),C1)

you have to place this fomula in cell B1 so it will get the value of your formula

You can also use IFNA(expression, value)