# Natural number

A natural number is a number that occurs naturally in the world. whole numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, … are natural numbers.

Natural numbers are also used to represent counting numbers. When we count, we use the natural numbers 1, 2, 3, 4, 5, … . Is 0 and natural number? No, 0 is not a natural number. Natural numbers are positive integers that start at 1 and go up from there. What are natural numbers in maths? Natural numbers are whole numbers that occur naturally in the world. We use them to count things: one apple, two cats, three cars, etc. Natural numbers can be positive or negative, but they are often used to refer only to the positive numbers (1, 2, 3, etc.).

##### Why is 0 a natural number?

There are a few different ways to think about this. One way is to think about the definition of a natural number. A natural number is a positive integer, which means it is a whole number greater than zero. So, in this sense, zero is a natural number because it is a whole number.

Another way to think about this is to think about the properties of natural numbers. Natural numbers have a lot of nice properties that make them useful for counting and measuring. For example, natural numbers are always greater than or equal to zero, they are always positive, and they always have a unique successor. So, in this sense, zero is a natural number because it has all of the properties of a natural number.

Of course, there are other ways to think about this as well. But these are two of the most common ways to think about why zero is a natural number. Is zero a rational number? Yes, zero is a rational number. This is because zero can be expressed as a ratio of two integers (0/1), and all rational numbers can be expressed as a ratio of two integers.

### Why 23 is not a natural number?

23 is not a natural number because it is not one of the counting numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100.