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Node.js | Buffer.writeFloatLE() Method

  • Last Updated : 30 Dec, 2019

The Buffer.writeFloatLE() method is an inbuilt application programming interface of class Buffer with in Buffer module that writes a value to the buffer at the specified offset with the specified little endian format. Note that the value must be a valid 32-bit float.

Syntax:

Buffer.writeFloatLE( value, offset )

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

  • value: This parameter holds a number that is to be written to the buffer.
  • offset: This parameter holds the number (integer) of bytes to skip before starting to write. The value of offset lies between 0 to buf.length-4. Its default value is 0.

Return value: It returns the offset along with number of bytes written.

Example 1:






// Node.js program to demonstrate the  
// Buffer.writeFloatLE() method 
  
// Creating a buffer of size 6
const buf = Buffer.allocUnsafe(10);
  
buf.writeFloatLE(0x1234567890ab, 0);
  
console.log(buf);

Output:

<Buffer b4 a2 91 55 62 01 00 00 38 e0>

Example 2:




// Node.js program to demonstrate the  
// Buffer.writeFloatLE() method 
  
// Creating a buffer of size 6
const buf = Buffer.allocUnsafe(4);
  
buf.writeFloatLE(0xabcafebabe, 0);
  
console.log(buf);

Output:

<Buffer ff ca 2b 53>

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

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

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