"Hello, World!".println
This calls the println function with the argument
"Hello, World!" (a string).
println then prints the argument (to stdout),
causing it to show up in your terminal.
To declare a variable in mers, use :=:
greeting := "Hello, World!"
To retrieve its value, simply write its name.
greeting.println
(todo)
Functions represent actions. Many represent transformations from some input to some output.
They are written as argument -> action:
a -> if a false else true
(todo)