This article originally appeared on Undark. Siraj Raval enthusiastically begins his YouTube videos by greeting his audience with the first two words any aspiring coder learns to produce: “Hello World!

Siraj is a Developer Educator at Polygon. He’s also a Youtube AI/ML Educator, Serial Entrepreneur, and Author of “Decentralized Applications” (O”Reilly). His mission is to create great explanations of ...