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Is 18 a whole number?

Last Updated : 03 Jan, 2024
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Numerals are the mathematical figures used in financial, professional as well as a social field in the social world. The digits and place value in the number and the base of the number system determine the value of a number. Numbers are used in various mathematical operations as summation, subtraction, multiplication, division, percentage, etc which are used in our daily businesses and trading activities. 

Numbers are the mathematical figures or values applicable for counting, measuring, and other arithmetic calculations. Some examples of numbers are integers, whole numbers, natural numbers, rational and irrational numbers, etc.

The number system is a standardized method of expressing numbers into different forms being figures as well as words. It includes different types of numbers for example prime numbers, odd numbers, even numbers, rational numbers, whole numbers, etc. These numbers can be expressed in the form on the basis of the number system used. 

 The elementary system to express numbers is called as number system. It is the standardized method for the  representation of numerals in which numbers are represented in arithmetic and algebraic structure.

Types Of Numbers

There are different types of numbers categorized into sets by the number system. The types are described below:

  • Natural numbers: Natural numbers counts from 1 to infinity. They are the positive counting numbers that are represented by ‘N’. It is the numbers we generally use for counting. The set of natural numbers can be represented as N={1,2,3,4,5,6,7,……………}
  • Whole numbers: Whole numbers count from zero to infinity. Whole numbers do not include fractions or decimals. The set of whole numbers is represented by ‘W’. The set can be represented as W={0,1,2,3,4,5,………………}
  • Rational numbers: Rational numbers are the numbers that can be expressed as the ratio of two integers. It includes all the integers and can be expressed in terms of fractions or decimals and is represented by ‘Q’.
  • Irrational numbers: Irrational numbers are numbers that cannot be expressed in fractions or ratios of integers. It can be written in decimals and have endless non-repeating digits after the decimal point. They are represented by ‘P’.
  • Integers: Integers are the set of numbers including all the positive counting numbers, zero as well as all negative counting numbers which count from negative infinity to positive infinity. The set doesn’t include fractions and decimals. The set of integers is represented by ‘Z. The set of integers can be represented as Z={………..,-5.-4,-3,-2,-1,0,1,2,3,4,5,………….}
  • Decimal numbers: Any numeral value that consists of a decimal point is a decimal number. It can be expressed as 2.5,0.567, etc.
  • The real number: The set of numbers that do not include any imaginary value and are constituent of all the positive integers, negative integers, fractions, and decimal values are real numbers. It is generally denoted by ‘R”.
  • Complex numbers: They are a set of numbers that include imaginary numbers are complex numbers. It can be expressed as a+bi where “a” and “b” are real numbers. It is denoted by ‘C’.

What are Whole Numbers?

The subset of the number system that consists of all positive integers including 0 is defined as a whole number. The whole number counts from zero to positive infinity. These numbers are mostly used for counting, measurement of fundamental quantities, and daily calculations.

Whole numbers are the only constituents of natural numbers including zero. The subset is given by {0,1,2,3,4,5,……….}, the set does not include fraction, decimals, and negative integers.

Examples of Whole Numbers

Positive integers also known as counting numbers including zero are the part of whole numbers, such as 0,1,2,3,4,5, etc, excluding negative integers, fractions, and decimals.

12, 120, 1200, etc all are examples of whole numbers.

Now, let’s jump into the question:

Is 18 a whole number?

Since, the whole numbers are set of real numbers that include zero and all positive counting numbers whereas, excludes fractions, negative integers, and decimals. For example 0,1,2,3,4,5,etc.

Therefore, 18 being a part of real numbers is a whole number.

Similar Questions

Question 1: What are the examples of whole numbers?


Real numbers like 10, 22, 32, 100 are examples of whole numbers.

Question 2: Is 0.5 a whole number?


No, 0.5 is a fractional value and the set of whole numbers does not include fractions.

Question 3: Is 0 a whole number?


Since the whole numbers are a set of real numbers that include zero and all positive counting numbers, 0 is also a whole number.

Question 4: Is 0.4 a whole number?


The whole numbers are a set of real numbers that include zero and all positive counting numbers. Whereas , excludes fractions, negative integers, and decimals. Hence, 4 being a decimal value is not a whole number.

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