Languages for purpose

> greet name = 
| "Hello " ++ name "!"
| 
-- UNFINISHED DEFINITION -------------------------------------------------- REPL

I got stuck while parsing the `greet` definition:

3| greet name = 
               ^
I was expecting to see an expression next. What is it equal to?

Here is a valid definition (with a type annotation) for reference:

    greet : String -> String
    greet name =
      "Hello " ++ name ++ "!"

The top line (called a "type annotation") is optional. You can leave it off if
you want. As you get more comfortable with Elm and as your project grows, it
becomes more and more valuable to add them though! They work great as
compiler-verified documentation, and they often improve error messages!

> greet name = 
| "Hello " ++ name ++ "!"
| 
-- UNFINISHED DEFINITION -------------------------------------------------- REPL

> greet : String -> String
| 
| 
| green name = 
| "hello " ++ name ++ "!"
| 
-- NAME MISMATCH ---------------------------------------------------------- REPL

I just saw a type annotation for `greet`, but it is followed by a definition for
`green`:

3| greet : String -> String
4| 
5| 
6| green name = 
   ^
These names do not match! Is there a typo?

    green -> greet

john = { first = "John", last = "Hobson", age = 81 }
{ john | last = "Houdini" }
{ age = 81, first = "John", last = "Houdini" }