Java Math - round() Method

The java.lang.Math.round() method returns the value of argument rounded to its nearest integer. In special cases it returns the following:

• If the argument is NaN, the result is 0.
• If the argument is negative infinity or any value less than or equal to the value of Long.MIN_VALUE, the result is equal to the value of Long.MIN_VALUE.
• If the argument is positive infinity or any value greater than or equal to the value of Long.MAX_VALUE, the result is equal to the value of Long.MAX_VALUE.

Syntax

public static long round(double a)

Parameters

Return Value

Returns the value of argument rounded to its nearest long value.

Exception

NA.

Example:

In the example below, round() method returns the value of argument rounded to its nearest long value.

import java.lang.*;

public class MyClass {
 public static void main(String[] args) {
  System.out.println(Math.round(48.45));   
  System.out.println(Math.round(48.55));   
 }
}

The output of the above code will be:

48
49