Convert numeric characters to alphabetic characters

Question

I am trying to get I/O as follows:

Input : 123490
Output : BCDEJA

Logic is simple:

if
strarr(i)=0,1,2

Answer 1

=CHAR(64 + 1)
will Give "A"
=CHAR(64 + 2)
will Give "B" 
=CHAR(64 + 3)
will Give "C" 

so on.....