**There are many types of numbers in the number system which are important for JEE Main and JEE Advance Exam, but some of the most common types are:**

**Natural numbers:**

**Natural Numbers are the numbers that are used for counting, ordering, and are represented by the set of positive integers {1, 2, 3, 4, …}. in other word, combination of cardinal and ordinal numbers is called natural numbers.**

**Whole numbers:**

**Whole Numbers are the numbers that include zero along with the natural numbers {0, 1, 2, 3, 4, …}. in other word, non-negative integers are called whole numbers.**

**Integers:**

**Integers are the set of whole numbers, their negatives, and zero {…, -3, -2, -1, 0, 1, 2, 3, …}. in other word, if we exclude decimal numbers from the set of real numbers then remaining real numbers will be Integers.**

**Rational numbers:**

**Rational Numbers are the numbers that can be expressed as a ratio of two integers (Can expressed in the form of p/q). For example, 2/3, -4/5, 0.75, and -1.25 are all rational numbers. They are terminating, non-terminating and repeating type of decimal numbers.**

**Irrational numbers:**

**Irrational Numbers are the numbers that cannot be expressed as a ratio of two integers (Can not expressed in the form of p/q) . They are non-repeating and non-terminating decimals such as pi (π) or the square root of 2.**

**Real numbers:**

**Real Numbers are the set of all rational and irrational numbers. They include all the numbers that can be plotted on a number line.**

**In other word, Set of Real Number is the union of Set of Decimal Numbers and Integers.**

**Imaginary Numbers:**

**Square root of Negative Numbers gives Imaginary numbers. Set of Imaginary Number is the Subset of Complex Numbers.**

**Complex numbers:**

**Numbers that can be expressed in the form a + bi, where a and b are real numbers and i is the imaginary unit, which is defined as the square root of -1. Set of Complex Numbers include both Imaginary and real Numbers.**