• Dictionary is a predefined mutable datatype used to store data in key-value pairs.

Dictionary

• Dictionary can be mutable
• Dictionary are used to store data values in key :values pairs
• there are no index in dictionary
• key values shood not be same
• and value can be same

info = {
"key" : "value",
"name" : "apanacollage",
"learning" : "python",
}
print(info)

info = {
    "name" : "cpandu",
    "age" : "lund",
    
}
print(info)
print(info["name"] = "geetha"

nested dictionary

info = {
"hi" : "hello",
"sub" : {
"eng" : "23",
"en" : "23",
"e" : "23",
}

sets

• set is a collection of the unordered items
• we cant store the mutable in the set
• set is immutable
• dictionary and list cannot be stored in the sets
• duplicate values are not stored