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* Travis CI: Add pytest --doctest-modules maths * Update lucas_series.py * Update lucas_series.py
28 lines
613 B
Python
28 lines
613 B
Python
"""Sieve of Eratosthones."""
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import math
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def sieve(n):
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"""Sieve of Eratosthones."""
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l = [True] * (n + 1)
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prime = []
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start = 2
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end = int(math.sqrt(n))
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while start <= end:
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if l[start] is True:
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prime.append(start)
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for i in range(start * start, n + 1, start):
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if l[i] is True:
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l[i] = False
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start += 1
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for j in range(end + 1, n + 1):
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if l[j] is True:
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prime.append(j)
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return prime
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if __name__ == "__main__":
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print(sieve(int(input("Enter n: ").strip())))
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