NETBEANS Java Basics 102 – Double Variables

PREREQUISITE

Download NetBeans from https://netbeans.org/downloads/

STEPS

1) Open the Startup Project.

Refer previous tutorial, http://javadevsteps.blogspot.com/2014/08/netbeans-java-basics-101-getting-started.html .

package firstproject;

public class FirstProject {

public static void main(String[] args) {

int first_number, second_number, answer;

first_number = 10;

second_number = 20;

answer = first_number + second_number;

System.out.println("Addition Total = " + answer );

}

2) Change Data Type to Double.

2-1 ) Change the keyword int to double.

package firstproject;

public class FirstProject {

public static void main(String[] args) {

double first_number, second_number, answer;

first_number = 10;

second_number = 20;

answer = first_number + second_number;

System.out.println("Addition Total = " + answer );

}

2-2 ) Change the value assignments as follows.

package firstproject;

public class FirstProject {

public static void main(String[] args) {

double first_number, second_number, answer;

first_number = 10.5;

second_number = 20.8;

answer = first_number + second_number;

System.out.println("Addition Total = " + answer );

}

2-3 ) Click Run button.

2-3) Outcome.

3) Perform Division Operation.

3-1 ) Change the value assignments as follows.

package firstproject;

public class FirstProject {

public static void main(String[] args) {

double first_number, second_number, answer;

first_number = 10.5;

second_number = 20.8;

answer = first_number / second_number;

System.out.println("Addition Total = " + answer );

}

3-2) Outcome.

REFERENCE

http://www.homeandlearn.co.uk/java/double_variables.html