What Is Floating Point Data Type With Example?


Angela Bailey

When working with programming languages, it is essential to understand different data types. One such data type is the floating-point data type. In this tutorial, we will explore what a floating-point data type is and provide examples to help you understand it better.

What is a Floating-Point Data Type?

A floating-point data type represents real numbers with fractional parts. It can store both whole numbers and decimal values. Unlike integers, which only store whole numbers, floating-point numbers offer more precision and flexibility in representing values.

In most programming languages, the floating-point data type is represented by keywords like float, double, or real. The specific keyword used may vary depending on the programming language you are using.

Floating-Point Examples:

Let’s consider an example to understand how floating-point numbers work:

Example 1:

Suppose we want to store the value of π (pi) in a variable called piValue. The value of π is approximately 3.14159.

In JavaScript, we can declare a variable using the var keyword and assign it a floating-point value as follows:

var piValue = 3.14159;

In this example, piValue is a variable of type float or double (depending on the programming language). It stores the value 3.14159 with decimal precision.

Example 2:

In C++, we can use the double keyword to declare a variable that stores larger decimal values with higher precision.

double gravity = 9.8;

The gravity variable stores the value 9.8, which represents the acceleration due to gravity on Earth. Using a double data type ensures that we can work with more precise values for calculations.

Benefits of Floating-Point Data Type:

The floating-point data type offers several benefits:

  • Precision: Floating-point data types allow for more precise representation of decimal values compared to integer types.
  • Range: Floating-point numbers can represent both small and large values, making them suitable for a wide range of applications.
  • Flexibility: Floating-point numbers can handle fractional values, enabling accurate calculations in scientific and mathematical operations.


In this tutorial, we explored the floating-point data type and its significance in programming languages. We learned that it allows us to work with real numbers that have fractional parts, offering precision, range, and flexibility. By understanding the floating-point data type, you will be better equipped to handle decimal calculations and solve complex problems in your programming endeavors.

I hope this tutorial has provided you with a clear understanding of the floating-point data type!

Happy coding!

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