C Tutorial

Comments in C

Comments in C are lines in the code that are not executed by the compiler. They are used to explain the code, increase readability, and make it easier to understand later.

💬 Types of Comments in C

• Single-line Comment: Starts with // and continues to the end of the line.
• Multi-line Comment: Starts with /* and ends with */.

🧪 Example

#include <stdio.h>

int main() {
    // This is a single-line comment

    /* This is a
       multi-line comment */

    printf("Hello, World!\\n"); // Prints message
    return 0;
}
  

✅ When to Use Comments

• To describe what the code does
• To leave notes or reminders
• To temporarily disable a line of code

❌ Common Mistakes

• 🚫 Unclosed multi-line comment: /* ... without ending */
• 🚫 Using // for multi-line text (older C compilers may not support it)

📝 Try It Yourself