summaryrefslogtreecommitdiffstats
path: root/Demo/scripts/primes.py
blob: 0924aab8e7b04ee83c3506a46ca764af3b6db90e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#! /usr/bin/env python

# Print prime numbers in a given range

def main():
    import sys
    min, max = 2, 0x7fffffff
    if sys.argv[1:]:
        min = int(eval(sys.argv[1]))
        if sys.argv[2:]:
            max = int(eval(sys.argv[2]))
    primes(min, max)

def primes(min, max):
    if 2 >= min: print(2)
    primes = [2]
    i = 3
    while i <= max:
        for p in primes:
            if i%p == 0 or p*p > i: break
        if i%p != 0:
            primes.append(i)
            if i >= min: print(i)
        i = i+2

if __name__ == "__main__":
    main()