Consider the following pseudocode function.
function W(n is in Z)
if n 0 then
if n is odd then
return 2n
else
return n + 1
else
return n − 1
Compute the values returned by the following function calls.
(a) W(14) =

(b) W(−20) =

(c) W(9) =

Question

Consider the following pseudocode function.
function W(n is in Z)
     	if n > 0 then
	     		if n is odd then
		     	     	return 2n
			else 	
				return n + 1 
else
		return n − 1
Compute the values returned by the following function calls.
(a)    W(14) =

(b)    W(−20) =

(c)    W(9) =

anonymous · Answer

We see that if $n$ is positive and odd we get back $2n$; if it's even, we get back $n+1$. If it's negative, we get back $n-1$. Break it down now:

(a) $n=14$ is positive and even so we get back $W(14)=14+1=15$
(b) $n=-20$ is negative so we get back $W(-20)=-20-1=-21$
(c) $n=9$ is positive and odd so we get back $W(9)=2(9)=18$

anonymous · Answer

thank u @oldrin.bataku