Revision: Integers Maths Secondary School (English Medium) (5 to 8) Class 7 CBSE

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

Whole numbers are a foundational concept in mathematics, encompassing all non-negative integers starting from zero.
Example: 0, 1, 2, 3, 4, ..., 367, 368, ..., 237105, ...

Positive Numbers: A positive number is one that is greater than zero. These are written as 1, 2, 3, … or with a ‘+’ sign as +1, +2, +3, … (though the ‘+’ is usually omitted).
Negative Number: A negative number is a number less than zero and is written with a ‘−’ sign, such as −1, −2, −3, …

The numbers −1, −2, −3, … (to the left of zero) are negative numbers or negative integers, and the numbers 1, 2, 3, … (to the right of zero) are positive numbers or positive integers.
Hence, the new set of numbers …, −3, −2, −1, 0, 1, 2, 3,… are called integers.