Preprocessor Directives vs. Comments

Preprocessor directives like #if 0 and #endif conditionally exclude code from compilation.

Reasons to use #if 0 instead of // or /* … */ comments:

• The code block already contains comments (you want comment lines already including comments)

Advantages:

• Can safely exclude large blocks of code
• Avoids issues with nested comments
• Useful in debugging or platform-specific code