YAML file in Easy Way

What is YAML file?
- It is basically a data format used to exchange data
- It is similar to XML and JSON
- Remember: It is not a programming language
- Note: In YAML, you can only store data and not commands
Data serialisation:
- It is a process of converting the data objects that is present in some complex data structure into stream of bytes that can be used to transfer data in physical devices
- Remember: Object= code + data
- Data Serialiser:
Data Serialisation language:
- Language that can be used to represent the data in text format
  - e.g. YAML, JSON, XML (Extensible Markup Language)
Why YAML ain't a markup language?
- Markup languages such as HTML are used to store documents. But in YAML you can also store object data
- It is used in Configuration file -> Docker/ Kubernetes etc.
- Used in logs, caches etc
Benefits of YAML:
- Simple and easy to read
- It has a strict syntax (Here indentation is important)
- Easily convertible to JSON, XML
- Most languase use YAML
- More powerful when representing complex data
- Parsing is easy
  - Parsing basically means reading the data
YAML File:
- Remember: YAML is case sensitive
- Key-Value pair:
  - e.g. "apple" : " I am a red fruit"
  - Remember: This particular thing is not stored in hashmaps and stuffs, this is just a textual representation
    - You can use this file and convert into a hashmap out of it
- Lists:
  - You represent it using dash (-)
  - ```
  -apple
  -mango
  -banana
```
- Block:
  - ```
  cities:
  -new delhi
  -mumbai
  -gujrat
```
- Variables:
  - Strings:
    - e.g.-
    - ```
    myself : Amaan
    fruit : "apple"
    job : 'student'
    bio : | //This is the Way to write in para
    hey I am Amaan and right now i am
    learning DevOps. Super Awsome learning 
    experience
    message : > //This is the Way to write in a single line
    This will be
    all in single line
```
- Specific Datatypes:
  - int:
    - e.g.
    - ```
    zero:!! int 0
    positiveNume:!! int 45
    negativeNum:!! int -45
    binaryNum:!! int 0b11001 //Starts with 0b
    octalNum:!! 06575 //Starts with 0
    hexa:!! int 0x45 //Starts with 0x
```
- Float:
  - ```
  marks:!!float 56.89
  infinite:!! float.inf
  notaNum: .nan
```
  - Boolean:
    - ```
    booleanValue:!! bool No
```
- String:
  - ```
  message:!!str this is a string
```
  - Null:
    - ```
    surname:!!null Null
```
- Advanced Data types:
  - Sequence data types:
    - Example-
    - Sometimes it may be possible that some of the keys of sequence will be empty this is known as *sparse sequence
    - Nested sequence:
  - Key-value pairs are known as maps
    - ```
    !!map
```
- Nested mappings:
  - Its nothing but Map within a map
- Pairs:
  - This is when keys have duplicate values
- Set:
  - It allows you to have unique values
  - ```
  !!set
```
  - Example:
    - names:!!set ?kunal ?apoorv ?rahul
  - Dictionary:
    - If you want to represent as entire sequence as value
    - ```
    !!omap
```
- Example:
- XML: JSON: YAML
  - Lets see how we will convert this into XML, JSON, YAML