pls help me understand this code and how did i get 1 as answer.if i edit vue of y result is 0

Question

https://code.sololearn.com/ccaA9EsVCuDi/?ref=app

Answer 1

y++ is executed in every iteration of the loop.

Answer 2

because 7%6 is 1?

Answer 3

but y was not specified in loop

Answer 4

it was not linked