TOPIC-PYTHON

In the below code why r=0 and please explain r=r*10+d

s=int (input("Enter any number:"))
r=0
while (s>0):
d=s%10
r=r*10+d
s=s//10
print ("reverse",r)

Explanation:

r=r*10+d shifts the previous value to the left (by multiplying by 10) and adds a new digit.

So imagine r = 123 and you want to append 4 to it.

First r is multiplied by 10, so you have 1230. Then you add 4, and get 1234.

The r variable builds up the reverse of s, so it starts at 0.

is this supposed to be a question ?