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About Pharo

Class { "A simple SUnit test"
	#name : #HelloWorldTest,
	#superclass : #TestCase }

{ #category : #testing }
HelloWorldTest >> testSayHello [
	    assert: HelloWorld sayHello
	    equals: 'Hello, World!'. ]

Key Features of Pharo


Pure object oriented

In Pharo, everything is an object. There are just objects interacting with messages.

Live environment

It provides immediate feedback during runtime. You can run and change your program on the fly.

Simple language

Language full syntax fits on a postcard, it has only 6 reserved words. It is easy to learn.

Dynamically typed

Pharo has dynamic type-checking in runtime - an object checks its operation at time of execution.

Universal use

Pharo can be used for web, desktop, AI, visualizations, math, IoT devices.


Pharo uses fast virtual machine that runs on Windows, macOS and Linux including the ARM processors.

Get mentored the Pharo way

Every language has its own way of doing things. Pharo is no different. Our mentors will help you learn to think like a Pharo developer and how to write idiomatic code in Pharo. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in Pharo - they'll help you discover the things you don't know that you don't know.

Learn more about mentoring

Community-sourced Pharo exercises

The Pharo track on Exercism has 45 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

See all Pharo exercises

Get started with the Pharo track

The best part, it’s 100% free for everyone.