Recursion in C, understand recursion example

Question

i am having trouble understanding this example. I cant figure out what actually happens after a certain point.

Here is the code, the result is supposed to be 4.

Answer 1

Here from code, recursion(1) = 3 and i/2 when i>1 , 9/2 = 4 (since int as parameter)

The base condition of this recursive function is when i = 1