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executable file

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# DarkCoder

def sum_of_series(first_term, common_diff, num_of_terms):

"""

Find the sum of n terms in an arithmetic progression.

>>> sum_of_series(1, 1, 10)

55.0

>>> sum_of_series(1, 10, 100)

49600.0

"""

sum = (num_of_terms / 2) * (2 * first_term + (num_of_terms - 1) * common_diff)

# formula for sum of series

return sum

def main():

print(sum_of_series(1, 1, 10))

if __name__ == "__main__":

import doctest

doctest.testmod()

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