The function "mystery" returns the value 24 when called with the argument 4. This recursive function calculates the factorial of a number by multiplying it with the factorial of the preceding number. The correct answer is Option B.
The "mystery" function is a recursive function that calculates the factorial of a given number. Here's how it works:
int mystery(int number) {
if (number <= 1) {
return 1;
} else {
return number * mystery(number - 1);
}
}
When called with a value of 4:
mystery(4) = 4 * mystery(3)
= 4 * 3 * mystery(2)
= 4 * 3 * 2 * mystery(1)
= 4 * 3 * 2 * 1
= 24
So, the correct answer is:
b) 24.
The complete question is:
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) 24.
c) 1.
d) 4.