Hello World (Tcl)

From LiteratePrograms

Other implementations: Ada | ALGOL 68 | Alice ML | Amiga E | Applescript | AspectJ | Assembly Intel x86 Linux | Assembly Intel x86 NetBSD | AWK | bash | BASIC | Batch files | C | C, Cairo | C, Xlib | Candle | Clojure | C++ | C# | Delphi | Dylan | E | Eiffel | Erlang | Forth | FORTRAN | Fortress | Go about Hello World (Go) | Groovy | Haskell | Hume | IBM PC bootstrap | Inform 7 | Java | Java, Swing | JavaScript | LaTeX | Lisp | Logo | Lua | Maple | MATLAB | Mercury | OCaml/F Sharp | occam | Oz | Pascal | Perl | PHP | Pic | PIR | PLI | PostScript | Prolog | Python | Rexx | Ruby | Scala | Scheme | Seed7 | sh | Smalltalk | SQL | Standard ML | SVG | Tcl | Tcl Tk | Visual Basic | Visual Basic .NET | XSL

"Hello, World!" in Tcl
The first line tells the operating system how to run the script.

<<hello_world.tcl>>=
#!/usr/bin/env tclsh
puts "Hello, World!"