As we all know, "hello world""Hello World" is usually the first program that any programmer learns/implementimplements in any language/framework.
As Aurélien Géron mentionedAurélien Géron mentioned in his book that MNIST is often called the Hello World of Machine Learning.
Hello World of Machine Learning, Isis there any Hello world"Hello World" problem of Reinforcement Learning?
A few candidates that I could think of are multi armed bandits problem, and Cart Pole Env.