---
title: "Discussion on \"Why 0! = 1\" | Hashnode"
description: "Discussion on \"Why 0! = 1\". A primer on factorials\nThe '!' behind the 0, is notation for something called a 'factorial'.\nA factorial basically tells you to take the product of all integers and itself before it until you reach 1.\nIf that didn't make any sense, take a look at thi..."
url: "https://hashnode.com/posts/why-0-1/61021569d3dd5634ae908f5f"
---

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# [Why 0! = 1](https://hashnode.prathamprasoon.com/why-0-1?utm_source=hashnode&utm_medium=feed)

A primer on factorials The '!' behind the 0, is notation for something called a 'factorial'. A factorial basically tells you to take the product of all integers and itself before it until you reach 1. If that didn't make any sense, take a look at thi...

Jul 29, 2021 · 2 min read · hashnode.prathamprasoon.com  
Updated Mar 21, 2022  
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-   [#math](https://hashnode.com/tag/math)

## Written by

[Pratham Prasoon](https://hashnode.com/@PrasoonPratham)

@PrasoonPratham · 🌍Mumbai

  
[View profile](https://hashnode.com/@PrasoonPratham)

Self taught programmer.

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