C Tutorial

COMMENTS IN C

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.

🗒️ Note: Comments are ignored during program execution.

💬 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

💡 Tip: Don't overuse comments. Your code should be simple and self-explanatory.

❌ Common Mistakes

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

📝 Try It Yourself

Add a single-line comment above a printf() statement.
Write a multi-line comment explaining what the main() function does.

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