Tuesday, December 4, 2007

Prime Number Program : Java Programming

This program explain you how to check the number is prime or not if user input the value from keyboard. Here is the source code :

import java.io.*;

class PrimeNumber {

public static void main(String[] args) throws Exception{

int i;

BufferedReader bf = new BufferedReader(

new InputStreamReader(System.in));

System.out.println("Enter number to Check:");

int num = Integer.parseInt(bf.readLine());

System.out.println("Prime number: ");

for (i=1; i < num; i++ ){

int j;

for (j=2; j<i; j++){

int n = i%j;

if (n==0){




if(i == j){

System.out.print(" "+i);