The **writable.end() method** is one of the applications of the stream module interface in Node.js. This method closes the writable stream and prevents any more data from being written to the writable stream. 




# Syntax
```
writable.end( chunk, encoding, callback)
```
# Parameters and return value

There are a total of three parameters:

1. `chunk`: This is an optional parameter. It specifies one last line of data to write to the stream before closing it.

2. `encoding`: The encoding to be used given that `chunk` is a string value, e.g., `utf-8`.

3. `callback`: This is an optional parameter and the function that is called before executing the `end()` operation. 

When the `end()` method is called, the code executes its relevant operations for closing the writable stream. Any further writing to the stream will raise an error.

# Code
Let's have a look at the code to understand it better. 

## Example: normal execution




// stream module
const stream = require('stream');

// creating writable object
const writable = new stream.Writable({

// declaring the write function 
write: function(chunk, encoding, next) {

	// printing the chunk of data.
	console.log(chunk.toString());
	next();
}
});

// Writing data
writable.write('hi');
writable.write('hey');
writable.write('hello');
writable.write('how are you?');

// calling end
writable.end("Finishing stream", "utf8", () => {
	console.log("Goodbye, Thank you!");
});


// stream module
const stream = require('stream');

// creating writable object
const writable = new stream.Writable({

// declaring the write function 
write: function(chunk, encoding, next) {

	// printing the chunk of data.
	console.log(chunk.toString());
	next();
}
});

// Writing data
writable.write('hi');
writable.write('hey');

writable.end("Finishing stream", "utf8", () => {
	console.log("Goodbye, Thank you!");
});

//writing data after ending the stream. This will raise an error
writable.write("trying to write data after end");

What is the stream module writable.end() method in Node.js?

The writable.end() method in Node.js closes a writable stream, preventing further data writing.

What is the stream module writable.end() method in Node.js?

Syntax

Parameters and return value

Code

Example: normal execution

Example: error