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  1. C is a powerful general-purpose programming language used for system software, application software, and more. Below is a simple example of a C program that prints "Hello, World!" to the console.

    #include <stdio.h>

    int main() {
    printf("Hello, World!");
    return 0;
    }
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    Key Concepts in C

    Variables and Data Types

    Variables are used to store data, and data types specify the type of data a variable can hold. Common data types include int, float, char, and double.

    Control Structures

    Control structures like if, else, for, and while are used to control the flow of the program.

    Example:

    #include <stdio.h>

    int main() {
    int num = 10;

    if (num > 0) {
    printf("Positive number");
    } else {
    printf("Negative number");
    }

    return 0;
    }
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    Functions

    Functions are blocks of code that perform specific tasks. They help in organizing code and reusability.

    Example:

    #include <stdio.h>

    void greet() {
    printf("Hello, World!");
    }

    int main() {
    greet();
    return 0;
    }
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    Arrays and Pointers

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  2. C language - cppreference.com

    Apr 26, 2025 · This is a reference of the core C language constructs.

  3. Online C Compiler - Programiz

    Write and run your C programming code using our online compiler. Enjoy additional features like code …

  4. C Tutorial - W3Schools

    C is a general-purpose programming language that has been widely used for over 50 years. C is very …

    Code sample

    int main() {
      printf("Hello World!");
        return 0;
    }
  5. Online C Compiler - online editor

    Online C Compiler. Code, Compile, Run and Debug C program online. Write your code in this editor and …

  6. C programming examples, exercises and solutions for …

    C programming examples, exercises and solutions for beginners Fundamentals Hello world program in C Basic input/output Basic IO on all data types Perform …

  7. Online C Compiler | Compile & Run C Code Online – OnlineCPP

    Compile and run C programs online instantly. Fast, secure online C compiler with real-time output, …

  8. CodeWithHarry/The-Ultimate-C-Programming-Course

    This course is designed to take you from a beginner to an advanced C programmer. The repository contains all the source code, projects, problem sets, and additional …

  9. This chapter presents the source code for a very simple C program and uses it to explain a few …

  10. C Language online compiler

    Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of …