How to exit in Node.js

I was able to get all my node processes to die directly from the Git Bash shell on Windows 10 by typing `taskkill -F -IM node.exe` - this ends all the node processes on my computer at once. I found I could also use `taskkill //F //IM node.exe`. Not sure why both `-` and `//` work in this context. Hope this helps!

Press `Ctrl + C` twice
or `.exit `.

>
(To exit, press ^C again or type .exit)
>

You may use [process.exit(\[code\])][1] function.

If you want to exit without a 'failure', you use code `0`:

process.exit(0);

To exit with a 'failure' code `1` you may run:

process.exit(1);

The 'failure' code of the failure is specific to the application. So you may use your own conventions for it.

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Open the command line terminal where node application is running and press **Ctrl + C**

if you want to exit a node js application from code,
```
process.exit(); // graceful termination
process.exit(1); // non graceful termination

The exit in node js is done in two ways:
----------------------------------------
- Calling **process.exit()** explicitly.
- Or, if nodejs event loop is done with all tasks, and there is nothing left to do. Then, the node application will automatically exit.

### How it works? ###

If you want to force the execution loop to stop the process, yo can use the global variable **process** which is an instance of **EventEmitter**. So when you call ***process.exit()*** you actually emit the **exit** event that ends all tasks immediately even if there still are asynchronous operations not been done.<br>

**process.exit()** takes an exit code (Integer) as a parameter. The code **0** is the default and this means it exit with a 'success'. While the code **1** means it exit with a 'failure'.

As process is global object, you don't need to import any module. The following function exits or kills the current node process.

> process.exit(code)
>
>
> process.kill(process.pid)
>
>
> process.abort()

If you're in Windows, go to Task Manager, then go to Processes, look for a process called "node", then click on it with the right button of your mouse and then click the "End Process" option.

import mongosse from 'mongoose'
import dotenv from 'dotenv'
import colors from 'colors'
import users from './data/users.js'
import products from './data/products.js'
import User from './models/userModel.js'
import Product from './models/productModel.js'
import Order from './models/orderModel.js'
import connectDB from './config/db.js'

dotenv.config()

connectDB()

const importData = async()=>{
try{
await Order.deleteMany()
await Product.deleteMany()
await User.deleteMany()

const createdUsers = await User.insertMany(users)
const adiminUser = createdUsers[0]._id

sampleProducts = products.map(product =>{
return {...product, user:adiminUser }
})
await Product.insertMany(sampleProducts)

console.log('Data Imported!'.green.inverse)
process.exit() //success and exit

}catch(error){
consolele.log(`${error}`.red.inverse)
process.exit(1) //error and exit

}

}

so here im populating some collections in a db and in the try block if i dont get any errors then we exit it with a success message , so for that we use process.exit() with nothing in the parameter.
If theres an error then we need to exit with an unsuccessfull message so we pass 1 in the parameter like this , process.exit(1).

extra: Here by exiting we mean exiting that typical node js program. eg if this code was in a file called dbOperations.js then the process.exit will exit and wont run any code that follows after process.exit

<kbd>ctrl</kbd>+<kbd>C</kbd> to terminate present process
<kbd>ctrl</kbd>+<kbd>C</kbd> twice is to exit REPL shell
<kbd>ctrl</kbd>+<kbd>c</kbd> to exit from REPL SHELL

Call the global [`process`][1] object's [`exit`][2] method:

process.exit()

[From the docs:][3]

> ## `process.exit([exitcode])`
> Ends the process with the specified `code`. If omitted, exit with a 'success' code `0`.
>
> To exit with a 'failure' code:
>
> process.exit(1);
>
> The shell that executed node should see the exit code as `1`.


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