Scoping closed

Question

int i ;
program main ()
{
    i = 10;
    call f();
}

procedure f()
{   
    i = 20;
    call g ();
}
procedure g ()
{   
    print i;
}

What will be the output using Static Scoping and Dynamic Scoping ? 

My ans : 

In Static Scoping  Global variable is set by main firstly,now global i=10

upon calling f , it sets the Global variable i to 20.

Calling g ---> output is 20.

Dynamic Scoping output is also 20 .

Can someone check this ?

Comments

In dynamic scoping also, 20 is the answer.

This question well represents the worst case of dynamic scoping. Upon calling f() in main, since f() does not have i it will search i in its caller function i.e. main(), there it will find that it is also accessing the global i, so it will change the value of i to 20, and next instruction is call g().

Same process will happen, g() search i in f() not found, go to caller of f() that is main result not found, finally go to global i and print that value which is 20.

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what about static scoping is my ans correct ?

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yes.

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can u explain what is static scoping and dynamic scoping??