What is the result of the expression "x-1", /* { int x=1; x-1} */ true or false?

Question

C++ / C#

I came across this code with a cycle:
int x=3;
for (int i; x-1; i++) {;}
I thought it would work twice but, for some reason, I can't fall out of it

Answer 1

It will subtract endlessly from "3" "1" in a loop

Answer 2

Everything is clear, thank you all, it was necessary to decrement