Looping through columns in table

Hi,

I've been testing around, after a friend told me a way to incoorporate loops in M and this is what I found myself.

MergedColumns = List.Accumulate(

        {7..40}, #"Changed Type",(state,current) 

        => Table.CombineColumns(state,

                                {"Column" & Number.ToText(current*2-1), "Column" & Number.ToText(current*2) },

                                Combiner.CombineTextByDelimiter("||",QuoteStyle.None),

                                "Column"& Number.ToText(current*2-1))

        )

And this works. It merges all columns between number 13 and 80 and gives them correct names.

Cheers

Meindert