Hi,

I have a cell where in I need to enter an alphanumeric strictly as under

AAAAI7504G

The rule is : First 5 should be alphabets, next 4 should be numbers and the
last again an alphabet.

The total characters are therefore 10. For the length of the character, we
can use Text length under Data validation. But we need to ensure that rule is
followed.

The above is only an illustration. But the positions of alphabets and
numbers should be as per the rule above.

Now is there any formula that throws up a warning saying that a number has
been entered in place of an alphabet. In other words, the above rule should
not be violated.

regards
krishna