The “Hello, world!” Program
As a first example, we use the standard “Hello, world!” program to demonstrate the use of the Scala tools without knowing too much about the language.
The structure of this program should be familiar to Java programmers: it consists of the method main which prints out a friendly greeting to the standard output.
Run it interactively!
The scala command starts an interactive shell where Scala expressions are interpreted interactively.
The shortcut :q stands for the internal shell command :quit used to exit the interpreter.
The scala command executes the generated bytecode with the appropriate options:
We may also run our example as a shell script or batch command (see the examples in the man pages of the scala command).
Note: We assume here that the file script.sh has execute permission and the search path for the scala command is specified in the PATH environment variable.
You can also download IDE :-
Scala IDE provides advanced editing and debugging support for the development of pure Scala and mixed Scala-Java applications.
Useful links:- http://www.scala-lang.org/