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Tuesday, October 6, 2020

Solution Exercise 764: algorithm python which calculate the remainder of sum in euclidean division
Python-courses-python-exercises-python-remainder-in-euclidean-division

Exercise 764

Write a python algorithm as function which takes as parameter an integer n and which returns the remainder in the Euclidean division by n of the sum of the first n integers Sn = 1 + 2 + 3 + ... + n.

Solution

# creating a function which calculates the sum of n first integer Sn = 1 + 2 + 3 + ... + n for a given integer n.
def sumFirst(n):
    # Initializing the sum of first integer  Sn = 1 + 2 + 3 + ... + n
    s = 0
    
    for i in range(1 , n + 1):
        s = s + i
    
    return s
# creating a function that calculate the remainder in the Euclidean division by n of the sum Sn = 1 + 2 + 3 + ... + n
def remainder_n(n):
    # getting the sum Sn = 1 + 2 + 3 + ... + n
    Sn = sumFirst(n)
    # the searched remainder is
    rm = Sn%n
    return rm
    
# Testing algorithm for n = 24
print('The remainder in eucliean division of Sn by n is   : ' , remainder_n(4)) # Sn = 1 + 2 + 3 + 4 = 10 , then Sn%4 = 2
# The output is : The remainder in eucliean division of Sn by n is   :  2


Younes Derfoufi
my-courses.net

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