How to exit the REPL

I'm trying to exit the REPL.

I use (. System exit 0) or (System/exit 0), but that causes an error:

Exception in thread "Thr开发者_运维问答ead-3" java.lang.RuntimeException: java.lang.IndexOutOfBoundsException

Is there another way to exit the REPL? How I can resolve this error?

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You can send the 'end-of-file' character.

You can just press ctrl-d (*nix) or ctrl-z (Windows) to exit the REPL.

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My answer is now 10 years old and was given a context of less understanding (although I think I shared the same confusion as the original asker so it kind of works).

(System/exit 0) does indeed exit the whole JVM - that might be what you want "to exit the REPL" but not necessarily. Clojure and it's REPL are designed to run in a multi-threaded environment and you can even have multiple REPLs connected to the same process. Obviously exiting the JVM is not what you want if you want to exit a REPL in an otherwise continuing process.

Original answer below:

It looks like you have a different problem in your code.

The way to exit the repl is:(System/exit 0)

The alternative syntax (. System exit 0) also works.

You can test this from a clean repl started with: java -cp clojure.jar clojure.main -r

The exception you get would seem to indicate an error in some indexed lookup before your code gets to the intended exit point, apparently on a different thread.

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The problem with (System/exit 0) is that it kills the whole JVM. The real question is how to programmatically exit just the current repl, and return to whatever function launched that repl.

Here is a convenient hack:

(clojure.main/repl
  ; Exit the repl whenever the user enters "exit" at the prompt.
  :read (fn [request-prompt request-exit]
          (let [form (clojure.main/repl-read request-prompt request-exit)]
            (if (= 'exit form) request-exit form))))

clojure.main/repl repeatedly calls a a reader, by default repl-read, to get one form at a time. One of the arguments to the reader is a special sentinel object that the reader is supposed to return when there are no more forms to be read. The default reader, repl-read, returns the sentinel value only on EOF. At the repl-read prompt, you do not have access to the sentinel object, so you cannot return it to tell the evaluator that you have finished entering forms. By installing your own reader, you can check for a particular form -- e.g., the symbol exit -- and return the sentinel object whenever this form is read, thus indicating to the evaluator that you are ready to exit the repl, without actually killing the entire VM.

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i just wanted to exit my REPL and landed here.

This seems to be a question that comes to everyones mind when starting to do first steps in the Clojure REPL. And of course I did not read the start-up message. The answer for my Clojure 1.7.0 is (exit) or (quit) or Control-d as stated in other replies.

nREPL server started on port 49276 on host 127.0.0.1 - nrepl://127.0.0.1:49276
REPL-y 0.3.7, nREPL 0.2.10
Clojure 1.7.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_72-b15
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
    Exit: Control+D or (exit) or (quit)
 Results: Stored in vars *1, *2, *3, an exception in *e

user=> (exit)
Bye for now!

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You may use the following key combination to exit Cider REPL in emacs: C-c C-q

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If you install "lein" then it's exit or quit like this:

$ lein repl
...
user=>exit
Bye for now!

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On Mac, use CTRL + C twice, see:

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to exit the repl: If you're running the repl from the command line then (as Sean mentions) ctrl-d
if you're running it from slime then Alt-x slime-quit-lisp should do it. if you're running it from eclipse then i'm not sure there is a clean way to exit use the little red button.

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today I have the answer, this is what I need

(import ('java.lang.management ManagementFactory)
(use 'clojure.contrib.shell)
(defn process-pid [] (let [m-name (.getName (ManagementFactory/getRuntimeMXBean))] (first (.split m-name "@"))))

(defn exit (sh "kill" (process-pid))

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In Windows (tested on Windows 7 x64), using the standard command shell (cmd.exe), the ctrl-Z (followed by the enter key) character appears to be the end-of-file indicator, it dropped me out of the REPL back to the command prompt. I suspect that this will also work equivalently in Windows PowerShell, would someone who is familiar with it please test and confirm...

Note also that this is for the stock Clojure REPL - if you are running the Datomic shell (which appears to be an instance of a Java Beanshell), enter "quit();"...

HTH.

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On Clojure 1.10.2 installed on Linux

(. System exit 0)