Tuesday, February 10, 2015

Prime Number Checking in java

public class PrimeTest {
public static void main(String[] args) {
// TODO Auto-generated method stub

for(int number = 2; number<=20; number++){
         //print prime numbers only
boolean r=false;
         for(int i=2; i<number; i++){
             if(number%i == 0){
             r=true;
             System.out.println(number+" is not prime");
             break;
             }
             else
             {
             r=false;
             }
          }
         if(r==false){
         System.out.println(number+" is prime");
         }
     }
}
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Output:
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