Dictionary in Python

 Dictionary:

• The dictionary data type is similar to the sets but a little bit different and the dictionary are also mutable.
• It contains pair of parameters. i.e, keys and values.
• Key is used to store element names.
• Value is used to store element values.

Syntax:

1. Declaring dictionry:

   Variable_name={}

   Example:

   dict={}

   Declaring value into the list:

   Variable_name={item_name 1: item_value 1,

                              item_name 2: item_value 2,

                              item_name n: item_value n}

   Example:

   std={"Roll_num":1000,'Name':'Kurshitha','Gender':'Female','mark':450}

Example program for print the dictionay of elements:

1. std={"Roll_num":1000, 'Name':'Kurshitha','Gender':'Female','mark':450}

   print("Student name: ",std['Name'])

   print("Elements in dictionary:")

   print(std)

Output:

Print element name in for loop using keys() function:

1. std={"Roll Number":1000,'Name':'Kurshitha','Gender':'Female','Mark':450}

   for i in std.keys():

       print(i)

Output:

Print element values in for loop using values() function:

1. std={"Roll Number":1000,'Name':'Kurshitha','Gender':'Female','Mark':450}

   for i in std.values():

       print(i)

Output:

Print key and values in for loop using item() function:

1. std={"Roll Number":1000,'Name':'Kurshitha','Gender':'Female','Mark':450}

   for k,v in std.items():

       print(k,":",v)

Output:

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