C Tutorial

INTRODUCTION TO C

Introduction to C Programming

C is a powerful general-purpose programming language. It is fast, portable, and widely used in system/software development, embedded programming, and more. It forms the foundation for many other languages, including C++, Java, and Python.

🔎 Did you know? The C programming language was developed by Dennis Ritchie in 1972 at Bell Labs. It was originally designed for UNIX systems.

✨ Why Learn C?

💻 Performance: C gives you low-level access to memory and hardware.
🔁 Portability: Code written in C is highly portable across systems.
🏗️ Foundation: Many modern languages have syntax or concepts influenced by C.
⚙️ Control: It allows fine-grained control of system resources.

📐 Structure of a Simple C Program

Here’s what a basic C program looks like:

#include <stdio.h>

int main() {
    printf("Hello, World!");
    return 0;
}

📂 Explanation

#include <stdio.h> → Tells the compiler to include the standard I/O library.
int main() → Entry point of the program.
printf() → Function to print output.
return 0; → Ends the program.

🧪 Try It Yourself

To run your first C program:

Use a C compiler like GCC.
Save your code as hello.c.
Compile using: gcc hello.c -o hello
Run with: ./hello

🧠 Remember

⚠️ C is case-sensitive! Main is different from main. Always write functions and syntax correctly.

💡 Tip

Practice by modifying the printf() statement to print your name, or display multiple lines using \n (new line).

printf("Hello!\nMy name is Technorank.");

📌 Summary

C is the foundation of many programming languages.
Its structure includes header files, a main() function, and statements.
It is best for system-level programming and understanding how computers work internally.

✅ Challenge: Try printing your own name and age using the printf() function!

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