F# - Display full results in F# interactive window

Question

Disclaimer: Total F# Newbie question!

If I type the following into an F# file in Visual Studio

#light

let squares =
    se         


        

Answer 1

If you want to display all the values in the sequence without transforming into a List, you can iterate directly on the sequence like so:

Seq.iter (printfn "%A") squares

Note that you're taking a risk: if, as Brian hints, the sequence is infinite, you could be in for a rather long wait. (In this case, Seq.skip and Seq.take are your friends)

Answer 2

'seq' is a lazily-evaluated construct; it could be infinite, which is why FSI only shows the first few values. If you want to see it all, an easy thing to do is convert to a list, e.g.

printf "%A" (squares |> Seq.tolist)

Answer 3

An alternative is to set fsi.PrintLength to a suitably large number, e.g.

> fsi.PrintLength <- 500

Answer 4

If you get output like output"+[121 chars]

fsi.PrintWidth <- 500

Will make it output more to the console.