**What Is a Double Data Type in Java?**

In Java, a __double__ is a data type that represents a double-precision 64-bit floating-point number. It is used to store decimal numbers with greater precision than the __float__ data type.

## Syntax

The syntax for declaring a variable of type __double__ is:

**double** variableName;
**double** variableName = initialValue;

## Precision and Range

The __double__ data type provides more precision than the __float__ data type. It can store numbers with up to 15 decimal digits of precision. The range of values that can be represented by a __double__ is approximately ±1.7 x 10^{-308} to ±1.7 x 10^{+308}.

## Example Usage:

**// Declaring a double variable without initializing it
double pi;
// Initializing a double variable
double radius = 5.5;
// Performing calculations using double variables
double circumference = 2 * Math.PI * radius;
double area = Math.PI * radius * radius;
// Printing the results
System.out.println("Circumference: " + circumference);
System.println("Area: " + area); **

### Note:

- The
*“Math.PI”* in the example above is a constant value representing the mathematical constant π (pi).
- The
*“System.println()”* statement is used to display the results on the console.

## Conclusion

The __double__ data type in Java is essential for handling decimal numbers with high precision. It allows programmers to perform calculations that require more accuracy than what can be achieved with the __float__ data type. Understanding and utilizing the __double__ data type effectively can greatly enhance the functionality and reliability of your Java programs.

If you found this tutorial helpful, feel free to explore other tutorials on our website to further expand your knowledge of Java programming!

### 6 Related Question Answers Found

The double data type in Java is used to represent decimal numbers with a higher precision compared to the float data type. It is a 64-bit floating-point number that can hold values ranging from approximately ±4.9 x 10^-324 to ±1.8 x 10^308. Declaration and Initialization of Double Variables
To declare a double variable in Java, you can use the following syntax:
double variableName;
For example:
double pi;
You can also initialize a double variable at the time of declaration:
double pi = 3.14159;
Precision and Range of Double Data Type
The double data type provides a higher precision compared to float, but it comes at the cost of range.

In Java, the double data type is used to represent floating-point numbers with double precision. It is a fundamental data type that is commonly used when dealing with decimal values that require a higher range and precision than the float data type. Range of Double Data Type
The range of values that can be stored in a double variable depends on its size, which is typically 64 bits or 8 bytes.

A fundamental concept in Java programming is the data type, which determines the type and range of values that a variable can hold. The double data type is one such type that allows for the representation of decimal numbers with double precision. The double data type in Java is a 64-bit floating-point number.

A common data type used in programming is the double data type. In this article, we will explore what the double data type is and provide examples to help you understand its usage. What is a Double Data Type?

What Is Long Double Data Type in Java? When working with numerical values in Java, it is important to choose the appropriate data type that can accurately represent the desired range and precision. One such data type is the long double.

Is Double a Valid Data Type in Java? In Java, the double data type is used to represent decimal numbers with double precision. It is a valid data type and commonly used when more precision is required than what can be provided by the float data type.