Explain to me the difference

Question

code N1
a = []
for x in range(1500,2000):
if x % 7 == 0 and x % 5 == 0:
a.append(x)
print (a)
#################
Code N2
a = []
for x in range(1500, 2000):
if (x%7==0) and (x%5==0):
a.append(str(x))
print (','.join(a))

Answer 1

1. In Code N1 you append integers to list "a". In Code N2 you append strings.

2. Output is different.

Code N1:
[1505, 1540, 1575, 1610, 1645, 1680, 1715, 1750, 1785, 1820, 1855, 1890, 1925, 1960, 1995]

Code N2: 1505,1540,1575,1610,1645,1680,1715,1750,1785,1820,1855,1890,1925,1960,1995

Answer 2

Not necessarily better. It all depends on what your program does and how you want the output to look like.

Answer 3

Then what is the difference now?
#code N3
a = []
for x in range(1500, 2000):
if (x%7==0) and (x%5==0):
a.append(str(x))
print (a)

Answer 4

The only difference is that strings are being appended.

Answer 5

So code N3 is more laconic, which is better right?