Number system is the method of writing digits or symbols to represent numbers.
Types of Numbers:
- Natural Number: Numbers that we use for counting are natural numbers. Natural numbers are cardinal (basic) numbers from which other numbers can be made.
1, 2, 3, 4, 5, 6, 7, ..... are Natural Numbers.
0 is not a natural number.
- Whole Number: Numbers without fractions are whole numbers. In easy language, zero and all natural numbers are whole numbers.
0, 1, 2, 3, 4, 5, 6, 7, ..... are Whole Numbers.
(0 & Natural Numbers are whole numbers)
- Integer: An integer is a number with no decimal or fractional part. Integers are the set of negative and positive numbers including zero (0).
-7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, ..... are Integers.
(Negative numbers & Whole numbers are Integers.)
- Rational Number: A number that can be written in the form of p/q (where p and q are integers and q ≠ 0).
-3/4, 0/2, 1/2, 1/4..... are Rational Numbers.
(Decimal numbers are also Rational numbers, as they can be written in the form of p/q. Example: 0.5 is a rational number, as it can be written as 5/10)
[Note: Rational numbers do not include square root of a number.]
-Written by Santosh Mishra (Mathematics Faculty Member, Buddham Edutech)
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