Increment Characters

Fariraishe_Shumba

When i try to number my items using integers I don't have problems because i just increment an integer number but now i want to number my items using characters from the alphabet,how do i increment characters and hence implement the solution?

mohana_cse06

Can you explain with one example please..

ara3n

something like this?

viewtopic.php?f=5&t=14078