2017-11-19 10:42:39 +01:00
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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2017-11-18 16:45:28 +01:00
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"""
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Napisz funkcję sum_from_one_to_n zwracającą sume liczb od 1 do n.
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Jeśli podany argument jest mniejszy od 1 powinna być zwracana wartość 0.
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"""
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def sum_from_one_to_n(n):
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2017-11-27 01:06:55 +01:00
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return 0 if n < 1 else reduce(lambda x, y: (x+y), range(1,n+1))
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2017-11-18 16:45:28 +01:00
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def tests(f):
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inputs = [[999], [-100]]
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outputs = [499500, 0]
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for input, output in zip(inputs, outputs):
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if f(*input) != output:
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return "ERROR: {}!={}".format(f(*input), output)
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break
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return "TESTS PASSED"
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if __name__ == "__main__":
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print(tests(sum_from_one_to_n))
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