I prefer explicit words over symbols, like in Scala:
scala> 1 to 3
scala.collection.immutable.Range.Inclusive = Range(1, 2, 3)
scala> 1 until 3
scala.collection.immutable.Range = Range(1, 2)
scala> 1 to 3
scala.collection.immutable.Range.Inclusive = Range(1, 2, 3)
scala> 1 until 3
scala.collection.immutable.Range = Range(1, 2)
> 1 through 3
# [1, 2, 3]
> 1 until 3 # or 1 to 3
# [1, 2]