What are Generators?

Generator functions are a new way of programming. They allow us to control the execution of a function and even change the state of the function in mid execution.

I'll compare the generator function with a simple analogy; the traffic system. When you drive your car on the road your controlled by the traffic system. Whilst driving you'll eventually come to a stop sign or red light, you yield to allow other traffic to flow. But how does this apply to a generator function? Well in the same way you can stop or tell the generator function to yield; allowing for some other process to take place and come back later to execute more commands in the generator function.

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Brilliant explanation! Hands down one of the best on this topic!