YAML :

A YAML file is like any other file which is used to represent configuration data. It define data in key-value pair. The key and value will be separated by a color and a white space(must).

In YAML file we must have to take care of spaces. Otherwise it will throw an syntax error.

	
 # Sample file:  	
	Animal: Dog
	Phone: iphone
	Laptop: Thinkpad
		

Array List :

If an element starts with dash(-) it indicates that it is an element of array in yaml file.

	
 # Array List:  	
	Fruits:
	-	Orange
	-	Apple
	-	Banana
	Vegetables:
	-	Carrot
	-	Potato
	-	Tomato
		

Dictionary :

A dictionary is a set of properties grouped together under an item.

We must have equal number of blank spaces before the properties of a single item so that they all are grouped together.

	
 # Dictionary / Map:  	
	Orange:
		Calories: 50
		Fat: 0.2 mg
		Carbs:	20 mg
	
	Mango:
		Calories: 60
		Fat: 0.3 mg
		Carbs:	40 mg		
		

	
 #List and Dictionary together:  
	Fruits:	
		-	Orange:
				Calories: 50
				Fat: 0.2 mg
				Carbs:	20 mg
		
		-	Mango:
				Calories: 60
				Fat: 0.3 mg
				Carbs:	40 mg		
		

Difference between Dictionary and List

dictionary is an un-ordered Collection. while list is an Ordered Collection.

	
 # Dictionary: An un-ordered pair  	
# Dictionary1 
	Orange:
		Calories: 50
		Fat: 0.2 mg
		Carbs:	20 mg
		
# Dictionary2 		
	Orange:
		Fat: 0.2 mg
		Calories: 50
		Carbs:	20 mg
	
	 # Dictionary1 = Dictionary2 , Although we have changed the position of element.  
		

		
 # List: An ordered pair  	
# List1 
	Fruits:
	-	Orange
	-	Apple
	-	Banana
		
# List2 		
	Fruits:
	-	Apple
	-	Orange
	-	Banana
	
	 # List1 != List2 , Since we have changed the position of element.  
		

# is used to provide a Comments in YAML file.