# 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.