Generating Columns with a for loop

[#1]

Hello, I try to generate several columns with the next JSL script line but when running the script the data table is blank: 

	For(i=0,i<3,i++,New Column( "A", Numeric, Continuous, Format( "Best", 10 ), Set Values( [1, 2, 3, .] )))

How can it be fixed?

[#2]

The syntax looks correct so I suspect the issue is with the context that you are using it.  To make this work, first create a table and then your add new columns.  To ensure columns are created in the correct table, make a reference to that table and 'send' the New Column message to it, as shown below:

Names default to here( 1 );

//Open a blank table and save a reference to it
dt = New Table( "New Table", Add Rows( 0 ) );

//Add columns to the table
For( i=0, i<3, i++,
	dt << New Column( "A", Numeric, Continuous, Format( "Best", 10 ), Set Values( [1, 2, 3, .] ))
);

[#3]

Can you look here please: https://community.jmp.com/t5/Discussions/Loop-is-not-working/m-p/77361#M36165

In the above link I try to make something similar but it not works

[#4 · Accepted solution]

Again, make the table first and then add the columns.  Here is some code that does what you want (I think):

Names default to here( 1 );

//Make the data table
dt = New Table( "Tokens",
	Add Rows( 3 ),
	New Column( "Visual_ID", Character, Nominal, Set Values( {"88", "89", "94"} ) ),
	New Column( "FF", Character, Nominal, Set Values( {"Y83", "YA8", "654"} ) ),
	New Column( "Bipping",
		Character,
		Nominal,
		Set Selected,
		Set Values(
			{"19|19|19|16|14|16|19|18|18|21|17|20|20|19|19|20|17|18|18",
			"19|19|19|16|14|16|19|18|18|21|17|20|20|19|19|20|18|18|18",
			"19|18|18|18|17|18|16|18|18|19|21|19|19|18|18|17|16|16|17"}
		)
	)
);

//Then add columns to it.
For( ii = 1, ii<19, ii++, 
	dt << New Column  ("My_Column_" || Char(ii), 
		Character, 
		Nominal, 
		Formula(
				Word( ii, As Column( Column( "Bipping"  ) ), "|" )
			
				)
			
	)
);