Can't understand this from Java docs

[crystal summit]

<@&987246399047479336> please have a look, thanks.

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[jaunty brook]

it gives information that the numbers must be relatively small

and bytes are usually used for things like I/O

[radiant fractal]

The idea is that you want to prevent invalid values
For example, an age can't be negative, so if possible, use a type which has no negative values (such a type doesn't exist in java tho), and so, int this case, you would need to add checks to verify the age
But in case a type exist
But if you have a value, which is always an integer, to prevent invalid decimal values, you would use an int, so if someone sees the int type, he knows there can't be any decimal values after the comma.
This can also be used with byte, ie the value can't go higher than 127, so you can use a byte to signal that so the person reading this code knows that values above 127 are not allowed
Tho I want to add a warning here, because it only works if the limits, are -128 to 127, if the limits are for example 100 ie if you have a score that can go from 0 to 100, then it wouldn't make sense to use byte, because you will have 27 invalid values anyway, and yes it's way less than int, but it's still values you have to check. On top of that, this is very misleading, because when you use byte, people thinks you use this types to actually stores bytes, so if you use byte to store a score from 0 to 100, this will be very misleading to people who will try to understand to the link between a score and bytes...
And so, I think that you should only use byte when you actually need to stores bytes, period.

I answered that tho

of ?

let's say you want to store a byte

do you store it in a byte type or an int type

?

yes

wdym

I don't understand

if you want a value which can have values from 0 to 255 or from -128 to 127, you may want to use a byte

[crystal summit]

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