What's the output of this code ?

Question

int a=1;
int b=2;
for (int i=0;i<10;i++){}
System.out.ptintln(a+"b");

Answer 1

@Ace .. oh thanks very much

Answer 2

um "12"?

Answer 3

when i give this answer in challenge it return wrong ...
when I tried this code in core playground it gave me an error message

Answer 4

1b is the right answer