integer or float?

Accidentally left option forcefloat active and a function of mine 
stopped working.  It boils down to this:

4 /aWorking/Zsh/Source/Wk 4 % cat test
#!/usr/bin/zsh

integer MAX_INDEX=2
local idx=
for ((idx=$MAX_INDEX; idx>0; idx--)); do
     echo $idx
done

4 /aWorking/Zsh/Source/Wk 4 % unsetopt forcefloat; .test
2
1

4 /aWorking/Zsh/Source/Wk 4 % setopt forcefloat; . test
2.
1.

... anyway I've figured out that 'integer idx' cures the problem, so it 
seems that forcefloat affects a scalar but not an integer which seems 
backwards.  Also, '1.' is mathematically distasteful is it not?  The 
trailing dot is rude, one might expect '1.0' or just leave the dot off 
when there is no actual float value. Thoughts?