required formula or macro for joining column2 with column 1
1.if + sign is not there then join as it is with _
2. if + sign is there then join after first + sign length is not fix
<tbody>
column 1
column 2
required
AAAAAAA
6
AAAAAAA_6
AAAAAAA+BBBBBBBBBBBB
2
AAAAAAA_2+BBBBBBBBBBBB...