I have to print numbers between two limits n and m, t times.

I created t variable that stores a number of test cases.

Outer for loop iterates for every test cases.

Inner for loop prints primes from m to n.

#Code

#include <stdio.h>
#include <stdlib.h>
 
int is_prime(int);
 
int main(void) {
 int t, m, n;
 scanf("%d", &t);
 for (int i = 0; i < t; i++) {
 scanf("%d %d", &m, &n);
 for (int j = m; j <= n; j++) {
 if (is_prime(j)) {
 printf("%d\n", j);
 }
 }
 if (i < t - 1) printf("\n");
 }
 
 return 0;
}
 
int is_prime(int num) {
 if (num <= 1) return 0;
 for (int i = 2; i * i <= num; i++) {
 if (num % i == 0) {
 return 0;
 }
 }
 return 1;
}

Problem: http://www.spoj.com/problems/PRIME1/

Can I have review?

I have to print numbers between two limits n and m, t times.

I created t variable that stores a number of test cases.

Outer for loop iterates for every test cases.

Inner for loop prints primes from m to n.

Code

#include <stdio.h>
#include <stdlib.h>
 
int is_prime(int);
 
int main(void) {
 int t, m, n;
 scanf("%d", &t);
 for (int i = 0; i < t; i++) {
 scanf("%d %d", &m, &n);
 for (int j = m; j <= n; j++) {
 if (is_prime(j)) {
 printf("%d\n", j);
 }
 }
 if (i < t - 1) printf("\n");
 }
 
 return 0;
}
 
int is_prime(int num) {
 if (num <= 1) return 0;
 for (int i = 2; i * i <= num; i++) {
 if (num % i == 0) {
 return 0;
 }
 }
 return 1;
}

Problem: http://www.spoj.com/problems/PRIME1/

Can I have review?