Question

Write a program to input your friends names and their Phone Numbers and store them in the dictionary as the key-value pair. Perform the following operations on the dictionary:
a) Display the name and phone number of all your friends
b) Add a new key-value pair in this dictionary and display the modified dictionary
c) Delete a particular friend from the dictionary
d) Modify the phone number of an existing friend
e) Check if a friend is present in the dictionary or not
f) Display the dictionary in sorted order of names

Answer 1

n = int(input("Enter how many names you want to enter: "))

# initialize empty dictionary

names={}

for i in range(n):

name=input("Enter name of friend: ")

number=input("Enter phone number: ")

names[name]=number #add name number to dictionary

print(names)

names["Arun"]="9877666234" #add new item

print("Modified dictionary ",names)

del names["Arun"] #delete an item

for name in names: #modify first key value

names[name] = "9456356344"

break

print("Amit" in names)

print("dictionary in sorted order")

for i in sorted (names) : #sort the dictionary

print((i, names[i]), end =" ")