Smalltalk is an object-oriented language and environment, created for educational use.

In a Workspace, you can evaluate a selection and get the result with mouse2, and print it:

"Comment between double-quotes."
| x y sum |
x _ 4.
y _ 16rF.
sum _ x + y. 19

"Strings are within single-quotes"
|pokemon|
pokemon _ 'Drifloon' Drifloon

"To print the time"
Time now 6:49:44 pm

If you'd like to know more about a specific class:

Pen inspect.

Smalltalk uses the left-arrow notation to assign, which is inserted with _, the vertical-arrow is inserted with ^.

Conditional

| x |
x _ 15.
( x > 10)
	ifTrue: ['True']
	ifFalse: ['False'].

Loops

Open a new window to show the System Transcript.

| x |
x _ 1.
10 timesRepeat: [
	Transcript show: (x\\3) printString; cr.
	x _ x + 1.
]

Drawing

Fill the screen

Display white
Display gray
Display black

FizzBuzz

| i fizz buzz |
i _ 1.
100 timesRepeat: [
	fizz _ i\\3=0.
	buzz _ i\\5=0.
	(fizz) ifTrue: [Transcript show: 'Fizz'].
	(buzz) ifTrue: [Transcript show: 'Buzz'].
	(fizz | buzz) ifFalse: [Transcript show: i printString].
	Transcript cr.
	i _ i + 1.
]

Emulation

To change the resolution of the window of the Smalltalk-80 emulator:

DisplayScreen displayExtent: 800@480.

The emulator below uses alt+left click for mouse3.

• Smalltalk Cheatsheet
• Smalltalk-80 Emulator
• Smalltalk-80: Bluebook, pdf

incoming: imperative uxn devlog 2023