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){

break;

}

}


! if(i == j){

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

}

}


}

}

What is a prime number