37 lines
522 B
Ruby
Executable File
37 lines
522 B
Ruby
Executable File
#!/usr/bin/env ruby
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# Ruby version of a Prime Number Finder
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# haplo@mindstab.net
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include Math
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class Primes
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def findPrimes(cmax)
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3.step(cmax,2) { |i|
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max = sqrt(i)
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isPrime = 1
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3.step(max, 2) { |x|
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isPrime = i % x
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if isPrime == 0
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break
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end
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}
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if isPrime != 0
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print i, "\n"
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end
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}
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end
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end
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MAX = ARGV[0].to_i;
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if ! MAX
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print "primes.rb <MAX NUM>\n"
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exit(1)
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elsif MAX < 1
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print "Invalid MAX Input\n"
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exit(1)
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end
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prime = Primes.new();
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prime.findPrimes(MAX);
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