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23 lines
471 B
Python
23 lines
471 B
Python
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# DarkCoder
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def sum_of_series(first_term, common_diff, num_of_terms):
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"""
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Find the sum of n terms in an arithmetic progression.
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>>> sum_of_series(1, 1, 10)
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55.0
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>>> sum_of_series(1, 10, 100)
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49600.0
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"""
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sum = ((num_of_terms/2)*(2*first_term+(num_of_terms-1)*common_diff))
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# formula for sum of series
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return sum
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def main():
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print(sum_of_series(1, 1, 10))
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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