Hello World

A “Hello, World!” is a simple program that outputs Hello, World! on the screen.

The code for it in the latest version of Java is as follows:

class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");

How “Hello, World” Works in Java

// Your First Program

In Java, any line starting with//



Variables are containers for storing data values.

In Java, there are many 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 decimals, such as 123 or -123.
  • float - stores floating point…



To run Node Server:

node *name of file you want to run in Node*

To install Express, a framework for Node:

$ npm install express --save

To install so that you don’t have to close the terminal every time you edit:

npm install --save-dev nodemon

To install stuff for app.get…




HTML, CSS, Angular and Java amateur at 16 years old. Is also learning UI/UX design as an encore.