NOT(~) vs NEGATION(!)

Question

#include 

using namespace std;
int main(int argc, char *argv[]) 
{
   int i=-5;
   while(~(i))
   {
      cout<         


        

Answer 1

'~' is the operator that : ~x = -x-1 and when i = -1, then ~i = 0. if you wonder the value of ~i, you can just print them out:

#include 

using namespace std;
int main(int argc, char *argv[]) 
{
   int i=-5;
   for (int i = -5; i <= 3; i++)
   {
    cout<

and then you will find: -5 4 -4 3 -3 2 -2 1 -1 0 0 -1 1 -2 2 -3 3 -4