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2016 Update

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Tina Müller 2016-12-05 22:15:40 +01:00
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Task/Interactive-programming/00DESCRIPTION
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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''.
Many language implementations come with an ''interactive mode''.
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.
This is a [[wp:command-line interpreter|command-line interpreter]] that reads lines from the user and evaluates these lines as statements or expressions.
For example, <tt>f('Rosetta', 'Code', ':')</tt> should return <tt>'Rosetta::Code'</tt>
An interactive mode may also be known as a ''command mode'', &nbsp; a ''[[wp:read-eval-print loop|read-eval-print loop]]'' (REPL), &nbsp; or a ''shell''.
Note: this task is not about creating your own interactive mode.
;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>