node how to set environment variable

Setting Environment Variable in Node.js

To set an environment variable in Node.js, follow these steps:

1. Using process.env:
2. Use the process.env object to access environment variables in Node.js. You can set a new environment variable by assigning a value to a new key in the process.env object.
3. Example: process.env.NEW_VARIABLE = 'new value';

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1. Using Command Line:
2. You can also set environment variables using the command line when running your Node.js application.
3. Example: NEW_VARIABLE=new_value node app.js

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1. Using .env File:
2. Create a .env file in the root directory of your Node.js application.
3. Add environment variables in the .env file in the format KEY=VALUE.
4. Example: NEW_VARIABLE=new_value

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By following these steps, you can effectively set environment variables in your Node.js applications.