| 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 | |
| 5 | def main(): |
| Tim Peters | e6ddc8b | 2004-07-18 05:56:09 +0000 | [diff] [blame] | 6 | import sys |
| 7 | min, max = 2, 0x7fffffff |
| 8 | if sys.argv[1:]: |
| 9 | min = int(eval(sys.argv[1])) |
| 10 | if sys.argv[2:]: |
| 11 | max = int(eval(sys.argv[2])) |
| 12 | primes(min, max) |
| Guido van Rossum | ec758ea | 1991-06-04 20:36:54 +0000 | [diff] [blame] | 13 | |
| 14 | def primes(min, max): |
| Tim Peters | e6ddc8b | 2004-07-18 05:56:09 +0000 | [diff] [blame] | 15 | if 2 >= min: print 2 |
| 16 | primes = [2] |
| 17 | i = 3 |
| 18 | while i <= max: |
| 19 | for p in primes: |
| 20 | if i%p == 0 or p*p > i: break |
| 21 | if i%p <> 0: |
| 22 | primes.append(i) |
| 23 | if i >= min: print i |
| 24 | i = i+2 |
| Guido van Rossum | ec758ea | 1991-06-04 20:36:54 +0000 | [diff] [blame] | 25 | |
| Johannes Gijsbers | 7a8c43e | 2004-09-11 16:34:35 +0000 | [diff] [blame] | 26 | if __name__ == "__main__": |
| 27 | main() |