Natural Numbers

Natural numbers are the numbers used for counting, beginning from 1 onwards.
They are denoted by the set N = {1, 2, 3, 4, 5, …}

1. The first and the smallest natural number is 1 (one).
2. It is impossible to obtain the last and greatest natural number. [In fact, there are infinite natural numbers, like counting the stars in nature.]
3. The difference between any two consecutive natural numbers is 1 (one).
4. By adding 1 to any natural number, its next natural number is obtained.
5. The fractions, like  `3/4, – `12/17`, `215/317` etc., are not natural numbers.
6. The decimal numbers like 3.4, 5.28, 2.227, etc., are not natural.
7. 0 (zero) is not a natural number.
8. No natural number is negative; i.e., none of -15, -3, -214, etc., is a natural number.
9. If n is any natural number
   (i) 2n is an even natural number and
   (ii) (2n - 1) is an odd natural number. 

• Counting pencils in a box: Natural numbers: 1, 2, 3,…

• Taking attendance: “Present: 35 students”—that’s a natural number.

• Scoring points in a game, numbering pages in a book, or steps climbed — all use natural numbers.

• Natural numbers: Counting numbers from 1 onwards (N = {1, 2, 3, …}).

• No zeros, no negatives, no decimals or fractions—only whole counts.

• Each natural number has a unique successor: just add 1.