Prime Number

Prime Number


Write a program to check if a number is prime or not.A number is prime if it has only two factors i.e. 1 and itself. ex:- 2,3,5,7,11,......etc.

import java.io.*;
class Numbers1{
public static void main(String args[])throws IOException{
//declare all the variables at the beginning
int n,i,j;
BufferedReader br = new BufferedReader(
 new InputStreamReader(System.in));
    System.out.println("Enter the number of rows : ");
    n=Integer.parseInt(br.readLine());
    //loop to generate the number of terms in the series
    for(i=n;i<=1;i--){
      for(j=1;j<=i;j++){
         System.out.print(j+" ");
        }//end of inner loop
      System.out.println();
    }//end of outer loop
  }//end of main
}//end of class        

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