Many language implementations come with an interactive mode.

This is a 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 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   (the 3rd argument).



Example

             f('Rosetta',  'Code',  ':')   

should return

             'Rosetta::Code'               



Note

This task is   not   about creating your own interactive mode.




C:\Program Files (x86)\Phix>p -repl
Warning: the repl is brand new, experimental, incomplete, and liable to crash!
Enter a statement such as "?remainder(floor(250/8),8)" or "puts(1,"Hi")"

>function f(string a,b,c) return a&c&c&b end function

>?f("Rosetta","Code",":")
"Rosetta::Code"

>quit
C:\Program Files (x86)\Phix>
