---
tag: 0EBACQFAZW
kind: concept
name: Cardinal number
aliases: [cardinal]
msc: ["03E10"]
sources:
  - url: https://en.wikipedia.org/wiki/Cardinal_number
    locator: lead section
same_as:
  wikidata: Q163875
  wikipedia: Cardinal number
---

## Summary

Cardinal numbers measure the size of sets, finite or infinite.
They generalize the natural numbers as answers to the question "how many elements?".