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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		 System.out.println("Enter a number to check if it is prime:");
  13.        Scanner kb = new Scanner(System.in);
  14.        int n = kb.nextInt();
  15.        boolean more = true;
  16.  
  17.  
  18.            for (int i = 2; i <= n/2; i++)
  19.            {
  20.                if (n <=1 || n%i==0) 
  21.                {
  22.  
  23.                     more = false;
  24.                     break;
  25.                }              
  26.             } 
  27.       if(more)
  28.       System.out.println(n + " is prime");
  29.       else
  30.        System.out.println(n + " is not prime");
  31. 	}
  32. }
Success #stdin #stdout 0.14s 321344KB
comments (?)
stdin
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5
stdout
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Enter a number to check if it is prime:
5 is prime
https://ideone.com/1HuhNH
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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