["python"]
What is the meaning of "int(a[::-1])" in Python?

I cannot understand this. I have seen this in people's code. But cannot figure out what it does. This is in Python. str(int(a[::-1]))
Assuming a is a string. The Slice notation in python has the syntax - list[<start>:<stop>:<step>] So, when you do a[::-1], it starts from the end towards the first taking each element. So it reverses a. This is applicable for lists/tuples as well. Example - >>> a = '1234' >>> a[::-1] '4321' Then you convert it to int and then back to string (Though not sure why you do that) , that just gives you back the string.