JavaScript Comments

Comments are lines of text in the code that are ignored by the JavaScript engine. They are used to explain code, make it more readable, or prevent execution of code for testing purposes.

1. Types of Comments

• Single-line Comments: Use // for comments that fit on a single line.

  // This is a single-line comment
  let x = 5; // Comment after a statement
  

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• Multi-line Comments: Use /* */ for comments that span multiple lines.

  /*
   This is a multi-line comment
   It can span multiple lines
  */
  let y = 10;
  

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2. Why Use Comments?

• Explain Code: Helps others (and your future self) understand what the code does.
• Debugging: Temporarily disable code without deleting it.
• Improve Readability: Makes complex logic easier to follow.

3. Best Practices

• Keep comments concise and relevant.
• Avoid over-commenting; focus on explaining why, not what the code does.
• Update comments when modifying code.

Conclusion

Comments are a simple yet powerful tool to enhance code maintainability and clarity, making it easier for yourself and others to understand and manage your code.