# Java Math round()

In this tutorial, we will learn about the Java Math.round() method with the help of examples.

The `round()` method rounds the specified value to the closest int or long value and returns it. That is, 3.87 is rounded to 4 and 3.24 is rounded to 3.

### Example

``````class Main {
public static void main(String[] args) {

double a = 3.87;
System.out.println(Math.round(a));

}
}

// Output: 4``````

## Syntax of Math.round()

The syntax of the `round()` method is:

``Math.round(value)``

Here, `round()` is a static method. Hence, we are accessing the method using the class name, `Math`.

## round() Parameters

The `round()` method takes a single parameter.

• value - number which is to be rounded

Note: The data type of the value should be either `float` or `double`.

## round() Return Value

• returns the `int` value if the argument is `float`
• returns the `long` value if the argument is `double`

The `round()` method:

• rounds upward if the value after the decimal is greater than or equal to 5
``````1.5 => 2
1.7 => 2``````
• rounds downward if the value after the decimal is smaller than 5
``1.3 => 1``

## Example 1: Java Math.round() with double

``````class Main {
public static void main(String[] args) {

// Math.round() method
// value greater than 5 after decimal
double a = 1.878;
System.out.println(Math.round(a));  // 2

// value equals to 5 after decimal
double b = 1.5;
System.out.println(Math.round(b));  // 2

// value less than 5 after decimal
double c = 1.34;
System.out.println(Math.round(c));  // 1

}
}``````

## Example 2: Java Math.round() with float

``````class Main {
public static void main(String[] args) {

// Math.round() method
// value greater than 5 after decimal
float a = 3.78f;
System.out.println(Math.round(a));  // 4

// value equals to 5 after decimal
float b = 3.5f;
System.out.println(Math.round(b));  // 4

// value less than 5 after decimal
float c = 3.44f;
System.out.println(Math.round(c));  // 3

}
}``````