Natural Numbers

Natural numbers are a set of numbers that are used for counting and ordering. They are the positive integers, starting from 1 and continuing indefinitely. In set notation, the natural numbers can be represented as:

N = {1, 2, 3, 4, 5, ...}

These numbers are called "natural" because they occur naturally and have been used for counting since ancient times. Natural numbers do not include zero or any negative numbers.

Some key properties of natural numbers include:

They can be used for counting objects or representing quantities.
They can be added, subtracted, multiplied, and divided to perform arithmetic operations.
They form the basis for other sets of numbers such as whole numbers, integers, and rational numbers.

It's important to note that the concept of natural numbers may vary slightly depending on the specific mathematical context, but in general, they refer to the positive integers starting from 1.