C Programming Basics Tutorial

Welcome to the C programming tutorial. This guide covers the basic concepts of C programming, including writing a simple program, using variables, and handling user input.

1. Writing Your First C Program

To start, let’s write a simple "Hello, World!" program in C. Here’s how:

#include 

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

    

This code will display Hello, World! when compiled and run.

2. Understanding Variables

Variables are used to store data. Here's an example of using an integer variable:

#include 

int main() {
    int num = 5;
    printf("The value of num is: %d\n", num);
    return 0;
}

    

When you run this code, it will output:

3. Taking User Input

You can also take input from the user using the scanf() function:

#include 

int main() {
    int age;
    printf("Enter your age: ");
    scanf("%d", &age);
    printf("You are %d years old.\n", age);
    return 0;
}

    

If the user enters 25, the output will be:

4. Conditional Statements

In C, you can use if statements to make decisions based on conditions:

#include 

int main() {
    int age;
    printf("Enter your age: ");
    scanf("%d", &age);

    if (age >= 18) {
        printf("You are an adult.\n");
    } else {
        printf("You are a minor.\n");
    }
    return 0;
}

    

If the user enters 20, the output will be:

5. Keyboard Shortcuts

• Ctrl + S: Save your C program.
• Ctrl + C: Compile your C program (in some environments).
• F5: Run your program after compilation.

6. Conclusion

You've now written basic C programs! With practice, you'll get better at using variables, functions, and control flow structures. Continue exploring C's features to become a proficient C programmer.