# Notes about perceptrons and sigmoid neurons

## Perceptron

A Perceptron behaves like a classifier. Suppose we have an input which we want to classify as either belonging to a category (labeled as 1) or another category (labeled as 0).
Its inner formula is given by
Given an input , for example , the Perceptron calculates a score: when the input belongs to the category labeled as 1, if the input belongs to a category labeled as 0.