The **`Buffer.readUIntLE()` method** is used to read a specified number of bytes as an unsigned little-endian integer from an allocated buffer at a specified offset.

**Endianness** represents the order of bytes in a computer system. There are two types of endianness: *little endian* and *big endian*. 
* **Big endian**: Big endian stores the most significant bytes (MSB) first.

* **Little endian**: Little endian stores the least significant bytes (LSB) first.





# Prototype
```javascript
buf.readUIntLE(offset, byteLength)
```

# Parameters
* **`offset`**: Determines the number of bytes to skip before starting to read.
* **`byteLength`**: Determines the number of bytes to read, which must be between $1$ and $6$ (inclusive). 

# Return value
`Buffer.readUIntLE()` returns an integer representation of the bytes read with up to a 48-bit accuracy. 
# Code

const buf = Buffer.from([0x05, 0x00, 0x00]);

console.log(buf.readUIntLE(0, 3));

In the code above, we have an array of three hexadecimal values from which we create our buffer. `Buffer.readUIntLE()` starts reading from the $0$ offset and reads three bytes in little-endian format. Thus, it reads a hexadecimal value of `0x00 00 05` as an integer value of `5`.

How to use Node.js buffer module readUIntLE()

The Buffer.readUIntLE() method reads bytes as an unsigned little-endian integer from a specified buffer offset.