1.  Single-line Comments:
Single-line comments are the simplest and most commonly used form of comments in JavaScript. They start with two forward slashes (//) and extend to the end of the line. These comments are perfect for adding short, concise explanations or annotations to your code.

// This is a single-line comment
let variable = 42; // Assigning a value to the variable

2. Multi-line Comments:
Multi-line comments, enclosed between /* and */, are used for longer explanations or for commenting out multiple lines of code. While they serve a similar purpose to single-line comments, multi-line comments are ideal for providing context to larger sections of code.

/*
This is a multi-line comment
It spans multiple lines for detailed explanations
*/
let result = performComplexCalculation();