一个判断素数的程序
package sushu;
import java.util.Scanner;
public class sushu {
public static void main(String[] args) {
Scanner scanner = new Scanner (System.in );
int a =scanner.nextInt();
int i;
if(a==1 || a==2) {
System.out.println("yes");
}
else {
for(i=2;i <= a;i++) {
if(a%i == 0 && a != i) {
System.out.println("no");
break;
}
else
if(i == a){
System.out.println("yes");
}
}
}}
}