Explore how to run source programs in Node.js

Node.js is a cross-platform JavaScript runtime for writing server-side and command-line tools. It is very popular among developers because it simplifies server-side programming in JavaScript. This article will explore how to run source programs in Node.js.

1. Install Node.js

Before you start running the source program, you need to install Node.js on your computer. You can download the version suitable for your system from the official Node.js website https://nodejs.org/. The installation process is similar to that of other software.

2. Create the source program

To run the source program in Node.js, you first need to create the source code file. You can use any text editor to create the source program, such as Sublime or Visual Studio Code. Please make sure there are no errors or syntax issues in the code.

Here is an example of a "Hello World" program:

console.log("Hello World！");

Save the code as a file named "hello.js".

3. Open the command line interface

To open the command line interface, please press the "Windows key R" (Windows operating system) and enter "cmd" in the pop-up run dialog box. Then click "OK".

4. Enter the directory where your program is located

In the command line interface, use the "cd" command to enter the directory where your program is located. For example, if your program file is located in the C:\Users\Username\Documents\Nodejs folder, you can enter the following command:

cd C:\Users\Username\Documents\Nodejs

5. Run the program

Enter the directory where the program is located After that, enter the following command to run the program file:

node hello.js

This will execute the "hello.js" file you created and output "Hello World!" in the command line interface.

Node.js can also run an interactive interpreter. You can start the Node interpreter and run JavaScript code within it. To start the interactive interpreter, enter the following command in the command line interface:

node

This will start the Node.js interpreter. You can enter commands in it, for example:

console.log("Hello World！");

This will output "Hello World!" directly on the command line.

6. Summary

Node.js is a powerful server-side JavaScript runtime. Learning how to run source programs in Node.js can help you better understand how it works. After studying this article, you should now know how to create a source program and run the program file in the command line interface. Good luck with your Node.js programming!

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