title: In GHCi, can I use the result of the previous expression?
body: <p>I'm doing some experimenting in GHCi, and I have a moderately long running (5 minutes) operation that I'm trying to tune. The result starts printing out partway through, and I can often tell that my algorithm isn't correctly tuned yet after 1 minute or less, so I cancel the operation. But when I do find the result, I want to allow it continue to the end, then use it afterwards as well. If I assign it when I start it, though, I can't see it as it processes. Is there any way I can access the result of the previous expression entered into GHCi?</p>