Java Variables Variables are containers for storing data values. In Java, there are different types of variables, for example: String – stores text, such as “Hello”. String values are surrounded by double quotes int – stores integers (whole numbers), without…
Java Comments Comments can be used to explain Java code, and to make it more readable. It can also be used to prevent execution when testing alternative code. Single-line Comments Single-line comments start with two forward slashes (//). Any text…
Print Numbers You can also use the println() method to print numbers. However, unlike text, we don’t put numbers inside double quotes: Example System.out.println(3); System.out.println(358); System.out.println(50000);
Print Text You learned from the previous chapter that you can use the println() method to output values or print text in Java: Example System.out.println(“Hello World!”);
Java Syntax In the previous chapter, we created a Java file called Main.java, and we used the following code to print “Hello World” to the screen: Main.java public class Main { public static void main(String[] args) { System.out.println(“Hello World”); }…
Java Install Some PCs might have Java already installed. To check if you have Java installed on a Windows PC, search in the start bar for Java or type the following in Command Prompt (cmd.exe): C:\Users\Your Name>java -version If Java…
What is Java? Java is a popular programming language, created in 1995. It is owned by Oracle, and more than 3 billion devices run Java. It is used for: Mobile applications (specially Android apps) Desktop applications Web applications Web servers…
