java help!!! please?

Question

Assume the following function F();

unsigned F(unsigned n)
{
if (n==0)
return 0;
//else
returnF(n/10) + n % 10;

what will be returned by the function call?

F(0)
F(1)
F(2)
F(10)
F(11)
F(12)
F(22)

any help is gladyl appresiated thanks

Answer 1

F(0) = 0
F(1) = 1
F(2) = 2
F(10) = 1
F(11) = 2
F(12) = 3
F(22) = 4
n be an integer