World 1 · Signals & Neurons · 3 minWhat is a neuron?
Inputs in, one number out
Teaching this? Open projector mode
An artificial neuron is tiny: it takes a few numbers in, multiplies each by a weight, adds them up, adds a bias, and passes the result through an activation function to produce one output number.
That single output can be read as a decision — for example, "how strongly do I believe this belongs to class A?"
Check yourself
What does a neuron do with each input?
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