Why comments are useful
Comments are useful because of the way it allows you to keep notes embedded into your code. In a situation in which code is shared, it helps other programmers understand what is going on in your code.
How to use comments
To add comments use use “//” for one line of comments and “/* */” for multiple lines of comments, for example...
Java
public class HelloWorld {
public static void main(String[] args) {
//the line below prints out "hello world"
System.out.println("Hello World");
/*the line above is going print out "hello world"
It will output that code on the screen*/
}
}