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