CppIsPrime.md
January 6, 2018 ยท View on GitHub
IsPrime is a Check code snippet to determine if an int is prime.
#include <cmath>
bool IsPrime(const int x) noexcept
{
const int max{
static_cast<int>(
std::sqrt(static_cast<double>(x))
) + 1
};
for (int i=2; i!=max; ++i)
{
if (x % i == 0) return false;
}
return true;
}