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PONot breaking out of for loop
 

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    <p>For some reason, when the candidate number reaches 21, it realises 21 is divisible by 3, but then won't break out of the for loop/ By contrast, for example for 25, is notes 25 is divisible by 5 then breaks out.</p> <p>It seems specifically, when div == 3, it doesn't break out of the loop. Why is this?</p> <pre><code>for cand in range (3,100): if cand%2 != 0: if ((cand ==3) or (cand ==5) or (cand ==7) or (cand ==11) or (cand == 13)): print str(cand) + ' is prime.' else: x = sqrt(cand) y= int (x) for div in range(3, (y+2)): if (cand%div == 0): print div print str(cand) + ' is divisible by' + str(div) div = 10*y elif (div == y): print str(cand) + ' is prime.' </code></pre> <p>Here's the output of the code:</p> <pre><code>3 is prime. 5 is prime. 7 is prime. 3 9 is divisible by3 11 is prime. 13 is prime. 3 15 is divisible by3 17 is prime. 19 is prime. 3 21 is divisible by3 21 is prime. 23 is prime. 5 25 is divisible by5 3 27 is divisible by3 27 is prime. 29 is prime. 31 is prime. 3 33 is divisible by3 33 is prime. 5 35 is divisible by5 37 is prime. 3 39 is divisible by3 39 is prime. 41 is prime. 43 is prime. 3 45 is divisible by3 5 45 is divisible by5 45 is prime. 47 is prime. 7 49 is divisible by7 3 51 is divisible by3 51 is prime. 53 is prime. 5 55 is divisible by5 55 is prime. 3 57 is divisible by3 57 is prime. 59 is prime. 61 is prime. 3 63 is divisible by3 7 63 is divisible by7 5 65 is divisible by5 65 is prime. 67 is prime. 3 69 is divisible by3 69 is prime. 71 is prime. 73 is prime. 3 75 is divisible by3 5 75 is divisible by5 75 is prime. 7 77 is divisible by7 77 is prime. 79 is prime. 3 81 is divisible by3 9 81 is divisible by9 83 is prime. 5 85 is divisible by5 85 is prime. 3 87 is divisible by3 87 is prime. 89 is prime. 7 91 is divisible by7 91 is prime. 3 93 is divisible by3 93 is prime. 5 95 is divisible by5 95 is prime. 97 is prime. 3 99 is divisible by3 9 99 is divisible by9 </code></pre>
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    1. COI can't see a `break`, `return` or `raise`. When are you expecting it to break out of either for loop and why?
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      1. USCB Bailey
    2. COso, I'm looking at the second for loop. If the cand%div produces no remainder, the div number is multiplied by 10, and therefore by my warped logic it should no longer by in range 3,(y+2). This logic seems to hold when the div number is anything other than 3...
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    3. CO@Ravin python for loops don't work that way. If you want to break use `break`
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      1. USDouglas Leeder
 

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