Print PrimeNumbers

class PrimeExample{ public static void main(String args[]){ int i,m=0,flag=0; int n=17;//it is the number to be checked m=n/2; for(i=2;i<=m;i++){ if(n%i==0){ System.out.println("Number is not prime"); flag=1; break; } } if(flag==0) System.out.println("Number is prime"); } } import java.util.Scanner;

public class PrimeNumber {

public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("enter starting value");
int a=sc.nextInt();
System.out.println("enter ending values");
int b=sc.nextInt();

for (int i = a; i <= b; i++) {

if (isPrime(i)) {
System.out.print(" " + i);
}
}
}

public static boolean isPrime(int b) {

if (count(b) == 2) {
return true;
}

return false;
}

public static int count(int a) {
int count = 0;
for (int i = 1; i <= a; i++) {
if (a % i == 0) {
count++;
}
}
return count;
}
}


Output:
enter starting value
20
enter ending values
30
 23 29