The answer is an infinite number. The loop never terminates because it continues while the condition:

n >= 0

is true. n is unsigned and thus cannot have a negative value. The actual initial value of n, or changes to its value such as:

n--

are irrelevant.

. دون توقف hi و هذا الكلام يعني ان البرنامج يستمر في طباعة
n >= 0 حيث تظل قيمة