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Thread: Hi everybody i have a little test and i need to ask something

  1. #1
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    Default Hi everybody i have a little test and i need to ask something

    So i have this code ("this is the correct form")
    public static String buildPrimeNumbers(int num){
    		String sum="";int j=num;
    		for (int i=2;i<=(j/2);i++){
    			while (num%i==0) {sum+=i+" ";
    			num=num/i;}
    		}
    	return sum;}
    and i have this one("this is what i did ,its look almost exectly like the first one exept i didnt install int j")
    public static String buildPrimeNumbers(int num){
    		String sum="";
    		for (int i=2;i<=(num/2);i++){
    			while (num%i==0) {sum+=i+" ";
    			num=num/i;}
    		}
    	return sum;}

    my question is my is my code doesn't give me the exact prime numbers as the correct one.
    what is the matter between if i put (i<=(num/2)) or (i<=j/2) .while j==num?


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Hi everybody i have a little test and i need to ask something

    The code in the loop changes the value of num. j is unchanged.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Hi everybody i have a little test and i need to ask something

    Great thanks alot

  4. #4
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    Default Re: Hi everybody i have a little test and i need to ask something

    i have a little test
    Anyone under 4 feet!
    Improving the world one idiot at a time!

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