May I repeat: Spelling 'if break:' and 'if not break:' rather than say
'on_break:' etc. would avoid adding new keywords.
I don't know what to do about the zero iterations case, though.
It could be that if `break` appears somewhere that an expression is expected, it becomes an expression with the value 0 or 1 (or False or True) to indicate the number of breaks that happened in the previous loop, and similarly some other bit of code involving keywords can become the number of iterations of the previous loop. This could be represented by `for`, `len(for)`, `pass`, etc. So one might write:
```
for x in ...:
...
if not pass:
...
elif pass == 1:
...
else:
...