Why we add 0 in the end

Question

Why (8+4)/2 the answer is 6.0 can't we print 6

Answer 1

12//2=6 (integer division)
12/2=6.0 (automatic convert to floating point)

Answer 2

python 3 should automatically print the code as 6, you can however define the sum as an int before you print it i.e.

n = int(8+3)/2
print(n)

this would print "6"

similarly you can use float as such:

n = float((8+2)/2)
print(n)

this would print 6.0