Java Basics Exercises – Part 2

What does this code displays in the console?

                String relationshipStatus = "Single";  
System.out.println(relationshipStatus);

Single relationshipStatus

What is the output of this code?

                String color = "Blue";     
//color = "Green";
System.out.println(color);

Green Blue

What is the return value of this round() method?

                System.out.println(Math.round(12.49));

12 13

What is the return value of this length() method?

                System.out.println("Hello World!".length());

11 because spaces are not counted by the length() method 12

How can we describe this code?

                String color = "Blue";

The variable blue holds the value color The variable color holds the value blue

What is a string in Java?

A string in Java is a sequence of characters, enclosed in double quotes “” A string in Java is used to hold numbers

What is a variable in Java?

A variable is a type of method that performs a specific task A variable is a name that holds a value, such as an age or email address

What’s the name of this variable?

                String device = "Tablet";

String device

What is the value of this variable?

                String country = "Canada";

String “Canada”

Use the name of the variable job to output its content.

                String job = "Chef";
System.out.println("");

Name this variable website .

                String "" = "dejavucode.com";

Define a variable named brand and assign it Nike as its value.

                ""
String product = "Air Max";

brand = String ; “Nike”

Update the value of the variable to Times Square, New York .

                String eventLocation = "Central Park, New York";
""

String == eventLocation ; = “Times Square, New York”

Update the variable by using the assignment operator .

                String favoriteColor = "Red";
favoriteColor "" "Blue";

What is the output of this Java program?

                String size = "Large";
size = "Medium";
size = "Small";

System.out.println(size);

Small Large
Medium
Small

Update the currentFilter by using the defaultFilter .

                String defaultFilter = "none";
String currentFilter = "size";
    
""

= currentFilter “none” ; defaultFilter

Define an integer variable.

                "" customerSatisfactionScore = 4;

Complete this variable definition.

                "" monthlyRevenue = 280000.0;

Complete this variable definition.

                "" annualProfit = "$960000";

Why do we use comments ?

To document our code and make it descriptive Comments are mandatory and must be provided for every line of code to run successfully

Java Exercises for Variables

If you’ve faced difficulties with these exercises, take a look at Variables Module on my Java course.

You can also share ‘Java Variables’ Exercises on your:
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Happy Coding!
Behnam Khani