How are following two code fragments different from one another?

Q. How are following two code fragments different from one another? Also, predict the output of following code fragments:

(a)

n = int (input ("Enter an integer : "))

if n > 0 :
    for a in range(1, n + n) :
        print (a / (n / 2))
    else :
        print ("Now quitting")

(b)

n = int (input ("Enter an integer : "))

if n > 0 :
    for a in range(1, n + n) :
        print (a / (n / 2))
else :
    print ("Now quitting")
 

Answer :-

Differences in both parts are followings:-

1. If we input a Negative number then there is no output in part (a) but in part (b) there will an output..

Example:-

(a)

Enter an integer : -4
>>>

(b)

Enter an integer : -4
Now quitting
>>> 

2. If we input positive number then there is "Now quitting" at the last line of the part (a) but no for (b).

(a)

Enter an integer : 2
1.0
2.0
3.0
Now quitting
>>>

(b)

Enter an integer : 2
1.0
2.0
3.0
>>>