Endianness

A word size is the fixed-size unit of data for a system.
The system will pad data to fit the word size.
We will use the playPad.c code to investigate this.
Endianess refers to the byte-order in which mutli-byte data is stored internally on a system.
Run this command:
```
    lscpu | grep Endian
```
The 2 types are:
1. Big Endian - the high-ordered bytes are stored first in memory.
2. Little Endian - the low-ordered bytes are stored first in memory.
We will use the playEndian.c code to investigate this.