Comments in C

 

💻 Comments in C (Easy Explanation)

In C (developed by Dennis Ritchie), comments are used to write notes or explanations inside the program.

👉 These are ignored by the compiler (they do not affect the output)

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🔹 What are Comments? 🤔

Comments are used to:

• Explain code 📖
• Make program easy to understand
• Help other programmers

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🔹 Types of Comments in C

🔸 1. Single-Line Comment (//) ✏️

👉 Used for writing comment in one line

✅ Example:

#include <stdio.h>

int main() {
    // This is a single-line comment
    printf("Hello");
    return 0;
}

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🔸 2. Multi-Line Comment (/* */) 🧾

👉 Used for writing comments in multiple lines

✅ Example:

#include <stdio.h>

int main() {
    /* This is a
       multi-line comment */
    printf("Hello");
    return 0;
}

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🔹 Important Rules ⚠️

✔ Comments are not executed
✔ Used only for understanding code
✔ Can be written anywhere in program

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❗ Invalid Example

/* This is wrong // mixing comments */

👉 Always close multi-line comment properly ❌

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🔹 Real-Life Example 🤔

👉 Comments = Teacher ke notes 📚
👉 Code = Exam answers

Notes help samajhne me, but exam me count nahi hote 😄

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🔹 Example with Proper Comments 🧠

#include <stdio.h>

int main() {
    int a = 10;  // storing value

    /* printing the value of a */
    printf("%d", a);

    return 0;
}

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🔹 Why Comments are Important? 🔥

• Makes code readable 👀
• Helps in debugging 🛠️
• Useful for teamwork 🤝

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🔹 Final Summary 📝

• // → single-line comment
• /* */ → multi-line comment
• Ignored by compiler
• Used for explanation only