NETBEANS Java Basics 102 – Double Variables

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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 

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