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# Java Program to Convert int into double

## What is int in Java ?

“int” is a primitive data type in Java that is used to represent integers (whole numbers) within a certain range of values. The range of values that can be stored by an “int” is from -2^31 to 2^31-1. The “int” data type is commonly used in mathematical operations and to represent arrays of integers.

**What is char in Java ?**

**“double”** is a primitive data type in Java used to represent a floating-point number **(a number with a decimal point)** with double precision, which means that it can store a wider range of values with **more accuracy** than a float. **The double data type takes up 8 bytes of memory** and has a **range of values from approximately 4.9 x 10^-324 to 1.8 x 10^308**. In Java, double values are written with a decimal point, such as **“1.23” or “0.0”**.

**Ways to Convert int into double : **

**Example 1 : **

public class Main { public static void main(String[] args) { int myInt = 42; double myDouble; // Typecast operator myDouble = (double) myInt; System.out.println("int value: " + myInt); System.out.println("double value: " + myDouble); } }

**Output :**

int value: 42 double value: 42.0

**Example 2 : **

public class Main { public static void main(String[] args) { int myInt = 42; double myDouble; // Double.valueOf() method myDouble = Double.valueOf(myInt).doubleValue(); System.out.println("int value: " + myInt); System.out.println("double value: " + myDouble); } }

**Output :**

int value: 42 double value: 42.0

**Example : **

public class Main { public static void main(String[] args) { int myInt = 42; double myDouble; // Arithmetic myDouble = myInt + 0.0; System.out.println("int value: " + myInt); System.out.println("double value: " + myDouble); } }

**Output :**

int value: 42 double value: 42.0

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