For the example in the slide, the scope of declaration of b in B0 does not include B1 because b is re-declared in B1. We assume that variables are declared before the first statement in which they are accessed. The scope of the variables will be as follows:
Declaration
Scope
int a=0
B0 not including B2
int b=0
B0 not including B1
int b=1
B1 not including B3
int a =2
B2 only
int b =3
B3 only
The outcome of the print statement will be, therefore:
