Ruby Examples: Hello World

Ruby Examples > Hello World

	`#---Hello World---`
Our first program will print the classic “hello world” message.
Here’s the full source code:	`puts 'hello world!'`
To run this, copy this single line code to a new plaintext file. Save the file as “hello.rb” and run it using the `ruby` command like so from the terminal: `ruby hello.rb`.
This should print: `hello world!`
Congrats! You’ve run your first ruby program and you did it without importing any library or defining a class or declaring a variable.
The `puts` method is typically how you’d print something to the standard output.
An empty `puts` prints an empty line.
You can also use `p` instead of `puts`. It’s shorter and provides extra info that’s useful while debugging:	`puts '42' # => 42 p '42' # => "42" puts "a\bb" # => b p "a\bb" # => "a\bb"`
Both `puts` and `p` are ruby methods from the `Kernel` module which is included by default implicitly in every ruby program.
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