Prime Number Java

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import java.util.;
/
nput:- 5 output :- Yes
4 No
2 Yes
*/
public class Main {
public static void main(String[] args) {
int n = 7;
int count =0;
for(int i=1; i<=n ; i++){
if(n%i ==0)
count++;
}
if(count==2)
System.out.println("Yes");
else
System.out.println("No");
}
}