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Using Comments in C++

Comments are used to explain code and are ignored by the compiler. C++ supports both single-line and multi-line comments.

Key Topics

Single-line Comments

Single-line comments start with // and continue to the end of the line.

Example: Using Single-line Comments

// This is a single-line comment
int age = 30; // Assign age to 30

Code Explanation: Comments help make the code more understandable. They are ignored during compilation.

Multi-line Comments

Multi-line comments start with /* and end with */.

Example: Using Multi-line Comments

/*
   This is a multi-line comment
   It can span multiple lines
   Let's assign values to variables
*/
int a = 10;
int b = 20;

Code Explanation: Multi-line comments are useful for commenting out blocks of code during debugging or providing detailed explanations.

Best Practices

  • Use comments to explain complex code logic.
  • Keep comments up to date with code changes.
  • Write clear and concise comments.

Don'ts

  • Don't overuse comments to state the obvious.
  • Don't leave outdated comments in the code.
  • Don't neglect commenting on important sections.

Key Takeaways

  • Comments improve code readability and maintainability.
  • They are ignored by the compiler.
  • Effective commenting is a vital part of programming.
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