Introduction to Programming in C

📘 Understanding C Program Structure

Every C program follows a specific structure. Understanding this structure is essential before you start writing complex programs. Let's break down each part of a typical C program and understand what it does.

🔍 Basic Layout of a C Program

#include <stdio.h>

// function declaration (optional)
void greet();

int main() {
    // variable declarations
    int a = 10;
    
    // function call
    greet();

    // logic
    printf("Value of a is: %d\n", a);

    return 0;
}

// function definition
void greet() {
    printf("Welcome to UdaanPath!\n");
}

📌 Key Components

• Header Files: #include <stdio.h> is used to include libraries like input/output functions.
• Main Function: int main() is where the execution starts.
• Variable Declarations: Variables must be declared before use.
• Function Calls: You can create and call your own functions.
• Return Statement: return 0; signals successful completion.

🛠️ Optional Components

• Comments: // single line and /* multi-line */ help document your code.
• Preprocessor Directives: Instructions processed before actual compilation like #define.
• User-defined Functions: Break your code into smaller, reusable parts.

✅ Why This Matters

A clear understanding of structure makes your code more organized and easier to debug. Writing clean code is a must-have skill for interviews and real-world projects.

📚 Suggested Practice

1. Write a program with a main function that prints your name.
2. Add a user-defined function to print a greeting message.
3. Use both single-line and multi-line comments.

🌐 Learn More at UdaanPath

For downloadable examples, exercises, and interview notes — visit our course hub on UdaanPath.com.

✅ Coming Next

Next, we’ll explore Variables and Data Types in C — the building blocks for storing and managing data.