Python-Quizzes | Python Dictionary Quiz | Question 25

Question 25:Find the output of the following program:

counter = {}

def addToCounter(country):
    if country in counter:
        counter[country] += 1
    else:
        counter[country] = 1

addToCounter('China')
addToCounter('Japan')
addToCounter('china')

print (len(counter))

(A) 0
(B) 1
(C) 2
(D) 3

Answer: (D)
Explanation: The task of “len” function is to return the number of keys in a dictionary. Here 3 keys are added to the dictionary “country” using the “addToCounter” function. The keys to a dictionary are case sensitive.
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