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24 lines
506 B
Python
24 lines
506 B
Python
# DarkCoder
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def sum_of_series(first_term: int, common_diff: int, num_of_terms: int) -> float:
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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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