Syntax: proc name args body

Defines a procedure with the given name, argument list args, and script body. The procedure may be called like any built-in command.

The argument list, args, is a list of argument specifiers, each of which may be:

• A name, representing a required argument
• A list of two elements, a name and a default value, representing an optional argument
• The name args, representing any additional arguments.

Optional arguments must follow required arguments, and args must appear last.

When called, the procedure returns the result of the last command in the body script, or the result of calling return, or an error.

Molt does not support namespaces or namespace syntax in procedure names.