Java Math.rint(double x) method returns the double value that is nearest to the given argument x and equal to a mathematical integer number. If two integer numbers are equally close to the given argument then this method returns the even number.
public class JavaExample
{
public static void main(String[] args)
{
double x = 32.5;
double x2 = 31.5;
//32 and 33 are equally close to x
//even number 32 is chosen
System.out.println(Math.rint(x));
//31 and 32 are equally close to x
//even number 32 is chosen
System.out.println(Math.rint(x2));
}
}
Output:
32.0 32.0
Syntax of Math.rint() method
Math.rint(16.5); //returns 16.0
rint() Description
public static double rint(double x): Returns the closest double value to the argument x, this value is equal to a mathematical integer.
rint() Parameters
- x: A double value.
rint() Return value
- Closest floating point value to the argument x, which is equal to an integer.
- If the argument x is NaN (Not a number), infinity or zero, then it returns the same argument with the same sign.
Example 1
public class JavaExample
{
public static void main(String[] args)
{
double x = 17.5;
double x2 = -17.5;
System.out.println(Math.rint(x));
System.out.println(Math.rint(x2));
}
}
Output:
Example 2
public class JavaExample
{
public static void main(String[] args)
{
double x = 0;
double x2 = -5.0/0; //-ve infinity
double x3 = Double.NaN;
System.out.println(Math.rint(x));
System.out.println(Math.rint(x2));
System.out.println(Math.rint(x3));
}
}
Output:
Example 3
public class JavaExample
{
public static void main(String[] args)
{
double x = Double.MAX_VALUE;
double x2 = Double.MIN_VALUE;
System.out.println(Math.rint(x));
System.out.println(Math.rint(x2));
}
}
Output:
