What value does function mystery return when called with a value of 4?
Int mystery int number )
{
If number

Question

What value does function mystery return when called with a value of 4?
Int mystery int number )
{
If number <= 1 )
Return 1;
Else
Return number * mystery number - 1 );
}
A) 0.
B) 1.
C) 4.
D) 24.

Quizplus · Accepted Answer

If the function is called with a value of 4, it will follow the else statement and execute the code "Return number * mystery (number - 1);". 
This will cause the function to call itself with a value of 3, then 2, then 1, and finally 0. 
At this point, the function will return 1 for all subsequent recursive calls. 
So, the final calculation will look like this: 
mystery(4) = 4 * mystery(3) 
mystery(3) = 3 * mystery(2) 
mystery(2) = 2 * mystery(1) 
mystery(1) = 1 
Therefore, mystery(4) = 4 * 3 * 2 * 1 = 24.

What Value Does Function Mystery Return When Called with a Value