**Numbers**are taken as input in different procedures of mathematical operations and their output produced on the other side is also a number. Numbers are of different types. Some of them are Natural Numbers, whole numbers, integers, fractions, real numbers, rational and Irrational Numbers.

Integers are the numbers formed by Natural Numbers including 0 along with the negatives of the non-zero natural numbers. They are also defined as the Set of all Positive and Negative Numbers which has a number zero with it. An Integer being positive or negative, is essentially any Whole Number equal to, lesser than or greater than one.

All mathematical operators can be performed on the natural numbers namely addition, subtraction, multiplication and division. Below given are few facts on the mathematical operations of integers:

**In addition,**

- If both integers are negative then the result is a negative number.
- If both integers are positive then the result is a positive number.
- If one of the integer is positive and another is negative, then the two digits are subtracted and the result we get contains the sign of the bigger digit.

**In subtraction,**

- If both the integers are negative then the result is the addition of integers with the negative sign before them.
- If one of the integer is positive and another is negative, then the two digits are subtracted and the result we get contains the sign of the bigger digit.

**In multiplication and division,**

- If both integers are negative then the result is a positive number.
- If both integers are positive then the result is a positive number.
- If one of the integer is positive and another is negative, then the result is a negative number.