Funny that 1 litre is singular but 1.0 lires is plural even though 1.0 is more precisely singular than 1.
IOW, English is screwy
IOW, English is screwy
Both in speaking language, and in quite some programming languages "1" is assumed to be an integer, and "1.0" is assumed to be a number with one decimal (something akin to a float). And I'd say integer "1" is the most precise type of one.
If we are rounding numbers you are right though...
round_to_int(0.5000000 to 1.499999) -> 1
round_to_one_decimal(0.9500000 to 1.049999) -> 1.0
It depends on the context/subtext: Is the other person trying to communicate something extra by adding the .0 portion?
Some are, some aren't. A programmer might use it to distinguish a data-type even though they are otherwise equal, an engineer might use it for significant-figures, etc.
Or perhaps more for one of a discreet object, where the litre is considered as a single thing but 1.0 is implying a continuous measurement so it changes how we think of it?
10 foot long pole.