Created
July 2, 2012 03:21
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is_prime? ruby method
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| def is_prime?(n) | |
| ((2..(Math.sqrt(n)))).each do |i| | |
| return false if n % i == 0 | |
| end | |
| return true | |
| end |
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a check is needed that 0 and 1 are not prime numbers.