int factorial(int n)
{
int p = 1;
while ( n > 0 ) {
p = p*n;
n = n-1;
}
return p;
}
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Note that as long as n is positive, the body of the while statement is executed.
However, the last action taken in the body is to decrease n's value by one, so eventually the repetition (loop) will stop.
Q: What does factorial return if n is initially zero or negative?
A: