rangeUntil

Creates an open-ended range from this Comparable value to the specified that value.

operator fun <T : Comparable<T>> T.rangeUntil(that: T): OpenEndRange<T>(source)

val openRange = 1.rangeUntil(5)   // 1..5 (exclusive of 5)

for (value in openRange) {
    println(value)   // prints 1, 2, 3, 4
}