0. comments.js

// All types of comments in JavaScript :
// Single-line comment using //
// Multi-line comment using /* ... */
// Documentation comment using /** ... */
// Inline comment using // at the end of a line
// Block comment using /* ... */ for multiple lines
// Commenting out code using // to disable execution
// Commenting is a way to include notes or explanations in your code without affecting its execution.
// It helps in understanding the code better and is useful for collaboration with other developers.


// Basic example of comments in JavaScript:
function calculateArea(radius) {
    // area of a circle given its radius
    const pi = 3.14159; // value of pi
    let area = pi * radius * radius; // formula: area = π * r^2
    return area; // Return the calculated area
}
console.log(calculateArea(5));