Natural number

A natural number is a number like 0, 1, 2, 3, 4, 5, 6, ... which can be used to represent the count of an object. The set of natural numbers is $N.$ Not all sources include 0 in $N.$

Natural numbers are perhaps the simplest type of number. They don't include , , , , or any of those complexities.

Thanks to their simplicity, natural numbers are often the first mathematical concept taught to children. Natural numbers are equipped with a notion of ($2+3=5$ and so on) and ($2\cdot 3=6$ and so on), these are among the first mathematical operations taught to children.

Despite their simplicity, the natural numbers are a ubiquitous and useful mathematical object. They're quite useful for counting things. They represent all the possible of finite . They're also a useful , in that numbers can be used to all sorts of data. Almost all of modern mathematics can be built out of natural numbers.