输出1-100间的素数并求和。-JSP教程,数据库相关

public class forprime {

public static void main(string[] args) {

int sum = 0;

for (int i = 2; i < 100; i++) {

if (isprime((long) i))

{

system.out.println(" isprime = " + i);

sum = sum +i;

}

}

system.out.println("the sum is:"+sum);

}

static boolean isprime(long num) {

double intsqrtofnum = math.sqrt((double) num);

int i = 0;

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

if (num % i == 0)

break;

}

if (i > intsqrtofnum)

return true;

return false;

}

}