What does X={0} and Y={1} mean ??

Answer 1

you can use placeholders for string manipulation mostly.

Answer 2

{} used for place holder

Answer 3

i write example for you

https://code.sololearn.com/cIL69gzy0951/?ref=app

Answer 4

Ty

Answer 5

does that mean some sort of position to our variable integer x=10and y=20