How to check the version number of nodejs

Node.js is a very popular development tool that allows developers to create fast, reliable and efficient projects. In the world of Node.js, versions are updated frequently, so it becomes very important to check the currently installed version. This article will show you how to check the Node.js version number, as well as some useful tips.

1. Use the command line to view the version number

In the command line, you can easily view the version number of Node.js by entering the following command:

node -v

After input , the currently installed Node.js version number will be displayed. For example, if the displayed result is v14.17.3, then this is the Node.js version number you currently have installed.

2. Use Node.js REPL to view the version number

Node.js REPL is a tool similar to a terminal or console, where JavaScript code can be entered and run directly. You can enter the following command in the Node.js REPL to view the currently installed Node.js version number:

process.version

This command will return the currently installed Node.js version number. For example, if the displayed result is v14.17.3, then this is the Node.js version number you currently have installed.

3. Use Node.js code to view the version number

You can also write a simple Node.js program to view the version number. Just add the following line to the code:

console.log(process.version);

Then run the program in the terminal and you will see the currently installed Node.js version number. For example, if the output is v14.17.3, then this is the Node.js version number you currently have installed.

4. Use NPM to check the Node.js version number

NPM is a tool widely used for Node.js package management. It is the default package manager for Node.js and through NPM you can install and manage Node.js packages. You can use the following command to view the currently installed Node.js version number:

npm -v

This command will return your currently installed NPM version number. Since NPM versions are usually updated together with Node.js versions, you can tell which Node.js version you currently have installed based on the NPM version.

5. Check the official version number of Node.js

In addition to the above methods, you can also check the current Node.js version number through the official website. On the official Node.js website (https://nodejs.org/) you can find the download page and thus the latest version of Node.js. In addition, the site provides documentation and details about each version.

Summary

The above are several common methods to check the Node.js version number. Whether you are viewing the version number on the command line, in the REPL, writing code, or through NPM, it is very convenient. So, these tips can help you better understand which Node.js version you are currently using and determine if you need to update to the latest version.

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