Name Rascal/InstallingAndRunning/Running/Help

Synopsis Help facilities.

Description Various forms of help are available.

At the command console, type :help to get a list of help commands.

In the Eclipse environment, select the menu Rascal > Start Tutor to start the interactive Rascal Tutor.

Examples

rascal>:help
Welcome to the Rascal command shell.

Shell commands:
:help                      Prints this message
:quit or EOF               Quits the shell
:declarations              Lists all visible rules, functions and variables
:set <option> <expression> Sets an option
e.g. profiling    true/false
     tracing      true/false
:edit <modulename>         Opens an editor for that module
:modules                   Lists all imported modules
:test                      Runs all unit tests currently loaded
:unimport <modulename>     Undo an import
:undeclare <name>          Undeclares a variable or function introduced in the shell
:history                   Print the command history
:clear                     Clears the console

Example rascal statements and declarations:
1 + 1;                     Expressions simply print their output and (static) type
int a;                     Declarations allocate a name in the current scope
a = 1;                     Assignments store a value in a (optionally previously declared) variable
int a = 1;                 Declaration with initialization
import IO;                 Importing a module makes its public members available
println("Hello World")     Function calling

Please read the manual for further information
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