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Thread: Prime numbers

  1. #1
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    Default Prime numbers

    print prime numbers up to a given maximum value.
    Accept the maximum value as a user input.
    A prime number is only divisible by 1 and itself.



    Java Code:
    package prime;
    
    import java.util.Scanner;
    
    public class prime {
    
    	public static void main(String[] args) {
    		//----------------------------------
    		//User input
    		//----------------------------------
    		Scanner userinput = new Scanner (System.in);
    		System.out.println("enter a number");
    		int input = userinput.nextInt();
    		//----------------------------------
    		//The for/if loop
    		//----------------------------------
    		
    		for (int l=2; l<=input; l++)
    		{
    			for (int k=2; k<=l; k++)
    			{
    				if (l==k)
    				{
    					System.out.println(l);
    				}
    				if (l%k==0)
    				{
    					break;
    				}
    			}
    		}
    	}
    }

  2. #2
    jim829 is offline Senior Member
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    Default Re: Prime numbers

    Do you have a question?

    Regards,
    Jim
    The Java™ Tutorial | SSCCE | Java Naming Conventions
    Poor planning our your part does not constitute an emergency on my part.

  3. #3
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    Default Re: Prime numbers

    Is it correct ?

  4. #4
    Norm's Avatar
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    Default Re: Prime numbers

    What happens when the code executes? Does it produce the desired results?
    If you don't understand my response, don't ignore it, ask a question.

  5. #5
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    Default Re: Prime numbers

    the results are :
    enter a number
    10
    2
    3
    5
    7

  6. #6
    Norm's Avatar
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    Default Re: Prime numbers

    Is that the desired output?
    If you don't understand my response, don't ignore it, ask a question.

  7. #7
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    Default Re: Prime numbers

    the steps are:
    print prime numbers up to a given maximum value.
    Accept the maximum value as a user input.
    A prime number is only divisible by 1 and itself.

    so im guessing its right output and coding... im not sure on the last step tho

  8. #8
    jim829 is offline Senior Member
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    Default Re: Prime numbers

    Quote Originally Posted by shad0wblade890 View Post
    im not sure on the last step tho
    What does that mean? It appears to be working.

    Regards,
    Jim
    The Java™ Tutorial | SSCCE | Java Naming Conventions
    Poor planning our your part does not constitute an emergency on my part.

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