swerWhat will be the output of the following Python code?def demo(p,q):  if(p == 0):    return q  else:    return demo(p-1,p+q)print(demo(4,5))

The given Python code defines a recursive function demo(p, q). This function checks if p is equal to 0. If p is 0, it returns q. Otherwise, it calls itself with parameters p-1 and p+q.

Let's break down the execution of demo(4,5):

1. demo(4,5) is called. Since p is not 0, it calls demo(3, 4+5) which is demo(3,9).
2. demo(3,9) is called. Since p is not 0, it calls demo(2, 3+9) which is demo(2,12).
3. demo(2,12) is called. Since p is not 0, it calls demo(1, 2+12) which is demo(1,14).
4. demo(1,14) is called. Since p is not 0, it calls demo(0, 1+14) which is demo(0,15).
5. demo(0,15) is called. Since p is 0, it returns q which is 15.

So, the output of the Python code will be 15.