Develop a program that uses a `while` loop to print all prime numbers between 1 and 100.

#include <iostream>
#include <cmath>

using namespace std;

bool isPrime(int num) {
if (num <= 1) {
return false;
}
for (int i = 2; i <= sqrt(num); i++) {
if (num % i == 0) {
return false;
}
}
return true;
}

int main() {
int num = 2; // Start from the first prime number
while (num <= 100) {
if (isPrime(num)) {
cout << num << " ";
}
num++;
}
return 0;
}