Auto Number After Inserting Row

[macky1730]

Hi guys, anybody can help me or giving me some idea on how to solve my problem.
I'm trying to make a table with autonumbering even if i insert a new row it will automatically add numbering according to row number. i tried it using IF function but after inserting row i have to drag the formula down again. please see attach. thanks

[snb]

You can use
=Row()

[macky1730]

You can use
=Row()

thanks. but how to automatically copy the formula without dragging the formula from top row?
I mean after inserting row it will automatically make a number as per the row number