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> But a REPL is essentially a single line editor from which you can evaluate expressions/statements.

It is not always single line, look at IDLE or even Firefox supports multiline REPL capabilities although it still needs some improvements (like not rerunning var declaration statements).

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Thanks. Multiline certainly raises the value of a REPL.

I think so too, though I guess single line makes more sense to an extent, there's a lot more that could be done with REPLs, like I'm surprised you can't just click on a previously submitted segment of code to be auto copied in the input text field (in the case of GUI based REPLs).

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