Global variables in C++
How Global variables are used in C++?
Explanation
Variables that are declared outside the scope of a function, so that it can be used anywhere in the program is known as Global Variables.
In the above example "pi" is declared as global variable outside any function. But the "pi" value is used inside the main function.
Example :
| #include <iostream.h> float pi = 3.14; int main( ) { int area,rad; rad = 100; area = pi*rad*rad; cout << "Area of a Circle:" << area << '\n'; return 0; } |
Result:
Area of a Circle: 31400
In the above example "pi" is declared as global variable outside any function. But the "pi" value is used inside the main function.
