>>> print("Hello\nWorld!") & >>> print('Hello\nWorld!')

Question

Is the output differt for these 2 strings? Diference between using single ' n double " ??

Answer 1

No difference. Both single quotes and double quotes work the same.

You just have to make sure you use the same ones together i.e. opening and closing a string with either both single, or both double - not mixing them.

Answer 2

I don't see a difference, you can try it yourself:
https://code.sololearn.com/c0U6Sz2dF7Vg/?ref=app

Answer 3

The more interesting thing to try is:
print('"Hello World"')
print("'Hello World'")

That way you can use quotation marks in strings without having to use extra break (backslash).