Java Math rint() Method

The rint() method of Java Math class returns the double value which is close to the specified argument and is equal to mathematical integer.

Syntax:

public static double rint(double a)

Parameters:

The parameter ‘a’ represents a double value.

Return Value:

The rint () method returns the double value that is close to a.

Special cases are as follows:

• It returns the same result as the argument, if the argument value is equal to mathematical integer.
• The result is same as that of argument, if the argument value is NaN or infinity or positive zero or negative zero.

Example 1:

public class JavaMathRintExample1 {
    //returns the double value that is close to a
    public static void main(String[] args) {
        double a=67.9;
        System.out.println(Math.rint(a));
    }
}

Output:

68.0

Example 2:

public class JavaMathRintExample2 {
    //result is same as that of argument, if the argument value is NaN
    public static void main(String[] args) {
        double a=Double.NaN;
        System.out.println(Math.rint(a));
    }
}

Output:

NaN

Example 3:

public class JavaMathRintExample3 {
    //result is same as that of argument, if the argument value is Negative infinity
    public static void main(String[] args) {
        double a=Double.NEGATIVE_INFINITY;
        System.out.println(Math.rint(a));
    }
}

Output:

-Infinity

Example 4:

public class JavaMathRintExample4 {
    //result is same as that of argument, if the argument value is zero
    public static void main(String[] args) {
        double a=-0d;
        System.out.println(Math.rint(a));
    }
}

Output:

-0.0