What is comment ?

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In an XML document, text that is ignored unless the parser is specifically told to recognize it.

In advanced Java, as well as in any programming language, a comment is a piece of text that is not executed by the compiler or interpreter. Comments are added to the source code to provide explanations, document the code, or disable certain parts temporarily. They are ignored during the compilation or execution process.

In Java, there are two types of comments:

  1. Single-line comments: These are created using “//”. Anything following “//” on a line is treated as a comment.
    java
    // This is a single-line comment
    int x = 5; // This comment is at the end of a line of code
  2. Multi-line comments: These are created using “/” to start the comment block and “/” to end it. Everything between “/” and “/” is treated as a comment.
    java
    /*
    This is a multi-line comment
    It can span multiple lines
    */
    int y = 10;

Comments are crucial for making code more readable and maintainable, as they allow developers to explain the purpose of code, provide context, and make it easier for others (or even the original developer) to understand the logic behind the code.