What are global variables explain with examples?

Answer 1

Variables that the program can use everywhere in the program. Example:

int x = 5;

int main(void)

{

x = 6;

foo();

return 0;

}

void foo(void)

{

x = 5;

}

Answer 2

• variables are named data areas that can change during the execution of the program
• constants are named or unnamed data areas that are prohibited from changing during the execution of the program

If named variables and constants may appear indistinguishable in the code, but will be declared differently.