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Task/Interactive-programming-repl-/00-TASK.txt

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+Many language implementations come with an ''interactive mode''. 
+
+This is a [[wp:command-line interpreter|command-line interpreter]] that reads lines from the user and evaluates these lines as statements or expressions. 
+
+An interactive mode may also be known as a ''command mode'',   a ''[[wp:read-eval-print loop|read-eval-print loop]]'' (REPL),   or a ''shell''.
+
+
+;Task:
+Show how to start this mode.
+
+Then, as a small example of its use, interactively create a function of two strings and a separator that returns the strings separated by two concatenated instances of the separator &nbsp; (the 3<sup>rd</sup> argument).
+
+
+;Example:
+            <big>  f('Rosetta',  'Code',  ':')  </big> 
+should return
+            <big>  'Rosetta::Code'              </big> 
+
+
+;Note:
+This task is &nbsp; ''not'' &nbsp; about creating your own interactive mode.
+<br><br>
+