program of Global and local variables

• A local variable is a variable that is declared inside a function. 
• A global variable is a variable that is declared outside ALL functions

   #include<iostream>
using namespace std;

int A, B;

int Add()
{
return A + B;
}

int main()
{
int answer;

A = 2;
B = 2;
answer = Add();
cout << A << " + " << B << " = " << answer;
return 0;
}