Node.js Buffer.writeFloatLE() Method

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