Comments in Java

Comments in any programming language are ignored by the compiler or the interpeter. The programmer uses it to either explain a block of code or to avoid the execution of a specific part of the code while testing.
There are two types of comments:

• Single-line comment
• Multi-line comment

Single/In-line comment

To write a single-line comment just add a ‘//’ at the start of the line.

Example

public class Main {
              public static void main(String[] args) {
                //This is a single line comment
                System.out.println("Hello learnwithvaigandla");
              }
            }
            

Output

Hello learnwithvaigandla

Multi-line comment

To write a multi-line comment just add a ‘/*…….*/’ at the start of the line.

Example

public class Main {
              public static void main(String[] args) {
                /*This
                is
                a
                Multi-line
                comment
                */
                System.out.println("Hello learnwithvaigandla");
              }
            }
            

Output

Hello learnwithvaigandla

Data types in Java

Data types in Java Data types represent the different values to be stored in the variable. There are two forms of Data types in Java.

Syntax of Java

Simple program in Java | Hello world Example We will create a file called Main.java and we use the following code to print "Hello learnwithvaigandla" to the screen.