| Guido van Rossum | f06ee5f | 1996-11-27 19:52:01 +0000 | [diff] [blame] | 1 | #! /usr/bin/env python |
| Guido van Rossum | ec758ea | 1991-06-04 20:36:54 +0000 | [diff] [blame] | 2 | |
| 3 | # Print prime numbers in a given range |
| 4 | |
| Guido van Rossum | ec758ea | 1991-06-04 20:36:54 +0000 | [diff] [blame] | 5 | def primes(min, max): |
| Mark Dickinson | ab6d373 | 2009-10-11 09:35:57 +0000 | [diff] [blame] | 6 | if max >= 2 >= min: |
| Georg Brandl | 4271eca | 2009-10-11 08:48:28 +0000 | [diff] [blame] | 7 | print 2 |
| Tim Peters | e6ddc8b | 2004-07-18 05:56:09 +0000 | [diff] [blame] | 8 | primes = [2] |
| 9 | i = 3 |
| 10 | while i <= max: |
| 11 | for p in primes: |
| Georg Brandl | 4271eca | 2009-10-11 08:48:28 +0000 | [diff] [blame] | 12 | if i % p == 0 or p*p > i: |
| 13 | break |
| 14 | if i % p != 0: |
| Tim Peters | e6ddc8b | 2004-07-18 05:56:09 +0000 | [diff] [blame] | 15 | primes.append(i) |
| Georg Brandl | 4271eca | 2009-10-11 08:48:28 +0000 | [diff] [blame] | 16 | if i >= min: |
| 17 | print i |
| 18 | i += 2 |
| 19 | |
| 20 | def main(): |
| 21 | import sys |
| 22 | min, max = 2, 0x7fffffff |
| 23 | if sys.argv[1:]: |
| 24 | min = int(sys.argv[1]) |
| 25 | if sys.argv[2:]: |
| 26 | max = int(sys.argv[2]) |
| 27 | primes(min, max) |
| Guido van Rossum | ec758ea | 1991-06-04 20:36:54 +0000 | [diff] [blame] | 28 | |
| Johannes Gijsbers | 7a8c43e | 2004-09-11 16:34:35 +0000 | [diff] [blame] | 29 | if __name__ == "__main__": |
| 30 | main() |