what is hello world

"Hello, World!" is a simple program that outputs the text "Hello, World!" to the screen. It is often used as a beginner's program to illustrate the basic syntax of a programming language. Typically, the "Hello, World!" program demonstrates how to write and run a basic output statement. It serves as an introductory exercise for new programmers and is a common step in learning any new programming language.

For example, here is how you might write "Hello, World!" in a few different programming languages:

- **Python:**

  ```python
  print("Hello, World!")
  ```

- **Java:**

  ```java
  public class HelloWorld {
      public static void main(String[] args) {
          System.out.println("Hello, World!");
      }
  }
  ```

- **JavaScript:**

  ```javascript
  console.log("Hello, World!");
  ```

- **C:**

  ```c
  #include <stdio.h>
  
  int main() {
      printf("Hello, World!\n");
      return 0;
  }
  ```

This simple program is often the first step in learning how to code, allowing newcomers to check that their programming environment is set up correctly and to understand the basic structure of a program in that language.