Column prefix

[Arihant]

Hi, i am trying to add a prefix to a all my headers, basically i have Sales manager, Date, Amount, Profit etc, i want 

1_Sales Manager

2_Date

3_Amount

4_Profit

The prefix would be combination of series of number from 1 and with delimeter "-" with the orginal text. 

Please let me what would be the possible solution to it, TIA

[wdx223_Daniel · Accepted solution]

=let a=Table.ColumnNames(PreviousStepName) in Table.RenameColumns(PreviousStepName,List.Transform(List.Positions(a),each {a{_},Text.From(_)&"_"&a{_}}))