Smalltalk syntax on a postcard

example.st

exampleWithNumber: x
  |y|
  true & false not & (nil isNil) ifFalse: [self halt].
  y := self size + super size.
  #($a #a 'a' 1 1.0)
    do: [:each | Transcript
                 show: (each class name);
                 show: (each printString);
                 show: ' '].
  ^ x < y