C Tutorial

Syntax in C Programming

In any programming language, **syntax** is like grammar in human language. It defines how we write code correctly. In C, syntax rules are strict. Even a small mistake like a missing semicolon can cause errors.

🧱 Basic Structure of a C Program

#include <stdio.h>  // Header file

int main() {        // Main function
    printf("Hello!"); // Statement
    return 0;       // Return statement
}
  

📌 Key Syntax Rules in C

• 🔹 Every **statement** ends with a **semicolon (;)**.
• 🔹 **Curly braces { }** define the start and end of a block of code.
• 🔹 **Comments** are added using // for single line or /* */ for multi-line.
• 🔹 Use **#include** to include header files like stdio.h.
• 🔹 The program execution starts from the **main()** function.

📝 Example with Comments

#include <stdio.h>

int main() {
    // This is a single-line comment
    printf("Learning C Syntax!");  // Print statement
    return 0;
}
  

🧪 Try It Yourself

❌ Common Syntax Errors

• 🚫 Missing semicolons
• 🚫 Unmatched braces { }
• 🚫 Misspelling function names like main or printf
• 🚫 Using wrong casing (like writing Main instead of main)

📌 Summary

• Each statement in C ends with a semicolon.
• Blocks of code are wrapped in curly braces.
• Execution starts from the main() function.
• Proper syntax helps the compiler understand your code.