I need to a cell to contain either 3 numbers or 3 numbers and a letter only.
I.E 308, 305E
In that way, if a letter appeared in any other position this would be wrong or of there was more then 4 characters and less then 3 or 2 numbers and a letter...this would be wrong.
How could I stop this ?
I.E 308, 305E
In that way, if a letter appeared in any other position this would be wrong or of there was more then 4 characters and less then 3 or 2 numbers and a letter...this would be wrong.
How could I stop this ?