day16.md

On the sixteenth day, I learned the following things about YAML.

Starting and ending point

'---' is the starting point
'...' is an ending point

Note: YAML doesn't support multi-line comment. It only supports '#' to be written with each line like this

# This is the first line
# This is the second line
# This is the third line

Write key value pair

Syntax: key: value

---
name: Bilal Khan
1: This is a number
{fruit: mango, age: 12}
...

Write a list

---
- apple
- mango
- orange
- Apple
...

Write data in block style

---
cities:
- city1
- city2
- city3

cities: [city1, city2, city3]
...

String values

YAML provide 3 types of string values

---
name: Bilal Khan
fruit: "this is a mango"
job: 'software engineering'
...

Write data in separate lines by inserting '|' sign

---
bio: |
"My name is Bilal"
"I am a developer"
...

Write single line in multiple lines by inserting '>' sign

---
message: > 
this is a single
line that I am
writing in multiple
lines
...

YAML will automatically detect the data type

---
number: 43
float: 34.65
boolean: Y # y, true, True, n, N, false, False
...

Write data types

Integer data type

---
zero: !!int 0
positiveNum: !!int 54
negativeNum: !!int -54
binaryNum: !!int 0b1011
octalNum: !!int 05346
hexaDecNum: !!int 0x54
commaVal: !!int 25_000 # is equal to 25,000
exponentialVal: !!int 6.02E54
...

Float data type

---
marks: !!float 54.65
infinite: !!float .inf
not a num: .nan
...

String and boolean data type

---
string: !!str "this is a string"
---
boolean: !!bool True
...

Null data type

---
null: !!null Null # !!null Null ~
~: this is also a key
...

Date data type

---
date: !!timestamp 2002-12-14
pakistan time: 2001-12-15T02:59:43.10 + 8:13
not a time zone: 2001-12-15T02:59:43.1Z
...

Explaining it in a video

Here you can get an explanation in a video. 16/60 Day of DevOps Challenge