For instance, question #1:
=IF(OR(ISBLANK(A1),ISBLANK(A2)),TRUE,FALSE)

HTH
--
AP

"MIchel Khennafi" a écrit dans le message de
...
Good afternoon to all

1 - How do I need to create my IF formula if I need to check to
conditions,
for instance IF A1 is empty or null and if A2 is empty or null THEN...

2 - Is there a topic in the help menu that explains how to use if to test
several conditions... or any white paper or any other documentation online
(pdf file...)

Thanks so much guys,

Michel