The double colon in c++ is technically known as "Unary Scope resolution operator".
Basically it is used when we have the same variable repeated for example inside our "main" function (where our variable will be called local variable) and outside main (where the variable is called a global variable).
C++ will alwaysexecute the inner variable ( that is the local one).
So imagine you want to use the global variable "Conundrum" instead the local one just because the global one is expressed as a float instead of as an integer:
#include
using namespace std;
float Conundrum=.75;
int main()
{
int Conundrum =75;
cout<<::Conundrum;
}
So in this case the program will use our float Conundrum instead of the int Conundrum.
