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Tuesday, May 11, 2021

Solution Exercise 23: number of occurrences of a character in a Python list without using any predefined functions
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Exercise 23

Write an algorithm in python that returns the number of occurrences of an 'a' element in a given list L without using any predefined functions in Python. Example if L = [7, 23, 5, 23, 7, 19, 23, 12, 29] and a = 23, the algorithm returns 3.

Solution

#coding: utf-8
def numberOccurrence (L, a):
     # initialize the number of occurrences of a in L
     numberOcc = 0
     for x in L:
          if x == a:
               numberOcc = numberOcc + 1
     return numberOcc
#Example
L = [7, 23, 5, 23, 7, 19, 23, 12, 29]
a = 23
print ("the number of occurrences of a in L is:", numberOccurrence (L, a))
# The output is: the number of occurrences of a in L is: 3


Younes Derfoufi
my-courses.net

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