JavaScript Comments

JavaScript comments are essential elements in code development that allow programmers to add explanations, notes, and annotations within their scripts. Comments play a crucial role in improving code readability, collaboration, and maintenance. In this article, we’ll explore the different types of JavaScript comments and provide examples to illustrate their usage.

1. Single-line Comments:
   Single-line comments are used to annotate a single line of code. They are preceded by two forward slashes (//).

// This is a single-line comment
let variable = 10; // Assigning the value 10 to the variable

2. Multi-line Comments:
   Multi-line comments are employed to annotate multiple lines of code. They begin with /* and end with */.

/*
  This is a multi-line comment
  It spans across multiple lines
*/
let result = addNumbers(5, 7); // Calling a function to add numbers

3. Commenting Out Code:
   Comments are also useful for temporarily excluding code during testing or debugging.

/*
let unusedVariable = 20;
console.log("This code is currently commented out.");
*/

4. Documentation Comments:
   Documentation comments are a special type of comment used for generating documentation automatically. They are often associated with tools like JSDoc.

/**
 * Calculates the sum of two numbers.
 * @param {number} num1 - The first number.
 * @param {number} num2 - The second number.
 * @returns {number} - The sum of num1 and num2.
 */
function addNumbers(num1, num2) {
  return num1 + num2;
}

5. Inline Comments:
   Inline comments provide additional information on the same line of code.

let x = 5; // Initializing variable x with the value 5
let y = 10; // Initializing variable y with the value 10

Conclusion:
JavaScript comments are invaluable tools for developers to communicate within their code. Whether it’s explaining complex logic, providing context for future modifications, or generating documentation, comments contribute to code maintainability and collaboration. By incorporating these commenting techniques into your JavaScript projects, you can enhance the clarity and understanding of your codebase.