New Entry: General Endianness (#821)

* Create endianness.md

* Update endianness.md

* Update content/general/concepts/endianness/endianness.md

Co-authored-by: Brandon Dusch <brandondusch@gmail.com>

* Update content/general/concepts/endianness/endianness.md

Co-authored-by: Brandon Dusch <brandondusch@gmail.com>

* Update content/general/concepts/endianness/endianness.md

Co-authored-by: Brandon Dusch <brandondusch@gmail.com>

* Update content/general/concepts/endianness/endianness.md

Co-authored-by: KTom101 <kyra.thompson@nyu.edu>

Co-authored-by: Brandon Dusch <brandondusch@gmail.com>
Co-authored-by: KTom101 <kyra.thompson@nyu.edu>

Author: 3 people

content/general/concepts/endianness/endianness.md

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+---
+Title: 'Endianness'
+Description: 'Endianness describes the order in which bytes are stored in memory for multi-byte values.'
+Subjects:
+  - 'Computer Science'
+  - 'Code Foundations'
+Tags:
+  - 'Numbers'
+  - 'Memory'
+CatalogContent:
+  - 'paths/code-foundations'
+  - 'paths/computer-science'
+---
+
+**Endianness** describes the order in which bytes are stored in memory for multi-byte values. The options are generally described as big-endian or little-endian. A big-endian system stores the most significant byte at the smallest memory address and the least significant byte at the largest. A little-endian system stores the least significant byte at the smallest memory address and the most significant byte at the largest.
+
+## Example
+
+To store the 32-bit integer `0x0A0B0C0D`, it is broken down into four bytes:
+
+- `0x0A`
+- `0x0B`
+- `0x0C`
+- `0x0D`
+
+The endianness of the computer system defines in what order these bytes are stored in memory. The following examples show it stored at memory address `0xFFF0` for both big- and little-endian systems:
+
+### Big-endian
+
+| Address  | Value  |
+| -------- | ------ |
+| `0xFFF0` | `0x0A` |
+| `0xFFF1` | `0x0B` |
+| `0xFFF2` | `0x0C` |
+| `0xFFF3` | `0x0D` |
+
+### Little-endian
+
+| Address  | Value  |
+| -------- | ------ |
+| `0xFFF0` | `0x0D` |
+| `0xFFF1` | `0x0C` |
+| `0xFFF2` | `0x0B` |
+| `0xFFF3` | `0x0A` |