__author__ = 'demi'


# Define a Dictionary, population,
# that provides information
# on the world's largest cities.
# The key is the name of a city
# (a string), and the associated
# value is its population in
# millions.

#   Key     |   Value
# Shanghai  |   17.8
# Istanbul  |   13.3
# Karachi   |   13.0
# Mumbai    |   12.5

population = {
    'Shanghai' : 17.8,
    'Instanbul' : 13.3,
    'Karachi' : 13.0,
    'Mumbai' : 12.5
}

print(population['Mumbai'])

population['Karachi'] = 30
print(population['Karachi'])