What is Global scope ?

Some Variable are outside the classes in C++ are knows as Global variable.

Some features of Global Scope.

• Initialized of Global variable is 0.
• Global Variable are not passed as parameters.
• The memory for global variables will be allocated before the execution of function main().

    
    #include < iostream>

using namespace std;

int g = 10;

void func1(){
	g = 20;
	cout << g << endl;
}

int main(){
	func1();
	g = 30;
	cout << g << endl;
	return 0;