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Node.js Buffer.writeUInt16BE() Method

  • Last Updated : 13 Oct, 2021

The Buffer.writeUInt16BE() method is used to write specified bytes using Big endian format to the buffer object. The value should be a valid unsigned 16-bit integer.

Syntax:

Buffer.writeUInt16BE( value, offset )

Parameters: This method accept two parameters as mentioned above and described below:

  • value: It is an integer value and that is to be written into the buffer.
  • offset: It is an integer value and it represents the number of bytes to skip before starting to write and the value of offset lies within the range 0 to buffer.length – 2. Its default value is 0.

Return value: It returns an integer value offset plus number of bytes written.

Example 1:






// Node.js program to demonstrate the  
// Buffer.writeUInt16BE() Method
  
// Allocate a buffer
const buf = Buffer.allocUnsafe(4);
  
// Write the buffer element in BE format
buf.writeUInt16BE(0xabcd, 0);
  
// Display the buffer list
console.log(buf);
  
// Write the buffer element in BE format
buf.writeUInt16BE(0xfede, 2)
  
// Display the buffer list
console.log(buf);

Output:

<Buffer ab cd f4 09>
<Buffer ab cd fe de>

Example 2:




// Node.js program to demonstrate the  
// Buffer.writeUInt16BE() Method
  
// Allocate a buffer
const buf = Buffer.allocUnsafe(4);
  
// Write the buffer element in BE format
buf.writeUInt16BE(0xabab, 0);
  
// Display the buffer list
console.log(buf);
  
// Write the buffer element in BE format
buf.writeUInt16BE(0xefde, 2);
  
// Display the buffer list
console.log(buf);

Output:

<Buffer ab ab ad 09>
<Buffer ab ab ef de>

Note: The above program will compile and run by using the node index.js command.

Reference: https://nodejs.org/api/buffer.html#buffer_buf_writeuint16be_value_offset




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