Basic

Hello world

Just run this code:

// Print a greeting
puts 'Hello, world!'

Comments

A comment starts with //

// This is an inline comment

And multi-line comment

/*
this is
a multi-line
comment
*/

No semicolon

There is no semicolon, so you should put your statements and expression line-by-line correctly.

// todo

Console

puts is a keyword which supports you to print values into console (stdout).

// todo