Python language has a well known feature named interactive mode where interpreter can read commands directly from tty.
I tipically use this mode to test if a given module is in the classpath or to play around and test some snippets.
Do you know any other programming languages that has Interactive Mode?
If you can, give the name of the languages and where possible, a web reference.
If it is already mentioned, you can just vote for it.
Ruby has irb, which is an interactive interpreter, and Ruby is quite similar to Python.
Ruby has it.. also Groovy has it (allowing you to test also Java code effectively).
bash / tcsh / csh / ksh /...
they all are programming languages and have a CLI :)
Erlang does, as well as Haskell and i'm guessing Ruby does. Also there are Javascript CLIs like Firebug
Most scripting languages will read from stdin and execute code typed at the console if you don't specify a filename to run. Php and perl will all do it.
Ruby has irb.
Lua has a more formal interactive mode like python, which will show you the indent level of your code at the prompt. It's very helpful since lua is typically used as an embedded scripting language, and you don't have to run your full application to test out code snippets.
Most (all?) lisps (including common lisp, scheme and clojure), sml, ocaml, haskell, F#, erlang, scala, ruby, python, lua, groovy, prolog.
Tcl/tk has one. It's been there since day one. This is not a feature unique to Python.
As has been pointed out lots of languages can be used interactively, though how conveniently they can be so used varies quite a bit. The interactive environment I'm most familiar with, and one that I have found among the most congenial of all the free environments for interactive programming I've tried (not that I've tried them all) is Slime, a mode for emacs that allows interaction with a running Common Lisp, and can also be used with Clojure, a Lisp for the JVM.
If Lisp isn't your cup of tea a variety of Smalltalk environments are worth mentioning. One of the interesting things about many Smalltalk systems is that they expose almost all of the code that implements the system in the programming environment- if you want you can browse or even rewrite parts of the programming environment as you are using it, just as you would write new code. In fact the line between the system provided to you and the code you are writing is pretty blurry. Squeak is an interesting free Smalltalk, and Cincom offers an evaluation version of their commercial Smalltalk, which is a great environment IMHO.
Anyway, if you're interested in playing with interactive environments you could do worse than to play with those two, though of course there are a lot of other systems out there that allow interactive programming to one degree or another.
FORTH comes immediately to mind.
So does APL.
I remember seeing an interactive FORTRAN implementation on an SDS-930 (I think), many, many moons ago.
Logo programming language.
Some implementations are so interactive that some people don't even use any other mode.
Boo is a nice middle ground between Python and C# - type-inference and procedural-compatible programming, with compatibity with .Net, plus ability to compile to CLR assemblies and .EXE's.
True to its name, the science-oriented and proprietary Interactive Data Language (usually just called IDL, but spelled out here to avoid confusion with the other IDL) has an interactive mode which many of its users utilize more often than they program in it.