what will be the exact output of y in this program?

#include int main() { int a,b=3; double x=5.0, y; for (a=1; a-2) { b=b-a; printf("%d%d ", a,b); } x=x-b; y=b%a; } printf("%3.1lf ", a+b+x+y); return (0); }

the answer in the slide is 0.000000.

why the answer is 0.000000 not 0?