YAML Syntax

• Always start your YAML file with three dashes.
  • if you have only one script okay. Three dashes are not required.
  • But if you're running multiple YAML scripts so this acts as a boundary.
• The Mapping syntax in Key:  value (space after the value is very crucial)
  • Mapping is nothing, but it's a dictionary.
• YAML supports different data types such as characters, strings, integers, floating value and collection like arrays lists that that are constructed from basic data types.
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• YAML also supports 
  • Lists, 
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  • Nested Lists and 
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  • Nested Dictionary
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