The initial value of the BoolFlag is set to True. The while loop checks the BoolFlag condition, which is initially True, thus entering the loop. Inside the loop, BoolFlag is immediately set to False before reaching the If condition. When the If condition checks BoolFlag, it finds it False and thus executes the Else block, printing 'World'. However, although the exhibition shows that 'World' is written, it won't happen as BoolFlag is already set to False before entering the if condition, which means the while loop exits instantly. Thus, in reality, nothing is written to the Output window .