I'll name a variable that's from 0% to 100%, `perc...

# random

[rtsketo]

I'll name a variable that's from 0% to 100%, percent.
How should a variable that's from 0 to 1 be called?

[mzgreen]

fraction?

[mzgreen]

An example from Android APIs: https://developer.android.com/reference/android/animation/ValueAnimator#getAnimatedFraction()

[louiscad]

xxxRatio

[Klitos Kyriacou]

I hope the variable is not called percent - it should be called somethingPercent or percentSomething depending on what that "something" represents. However, percent would be a good name for a @JvmInline value class .

[louiscad]

Percentage would be even better for a value class IMO.

[Matteo Mirk]

Also “probability” has a value that ranges in [0,1]∈ℚ 😛

[Tomasz Krakowiak]

Name that damn variable by name that represents it's freaking meaning, not by it type! : P

[Tomasz Krakowiak]

ex:

value class Fraction(
    /** Value in range [0,1] */
	val value : Double
)

val lookingForMyMeaning : Fraction

[Tomasz Krakowiak]

And preferrably don't mix percentage [0,100] and fraction [0,1] in your API. Stick to fraction.

[Klitos Kyriacou]

Yes, don't mix units. The Mars Orbiter disaster was caused by mixing metric and old units.

[rtsketo]

That's why I prefer to have the types (units) in my variables' name. For example for custom Views in Android I use dpWidth and pxWidth. There are always the option of annotations or wrapper classes, but isn't that the easiest way? Same goes for the percentage (as it is a form of unit, %).