January 2017
Intermediate to advanced
420 pages
9h 25m
English
Content preview from Programming KotlinBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Ranges
A range is defined as an interval that has a start value and an end value. Any types which are comparable can be used to create a range, which is done using the .. operator:
val aToZ = "a".."z"
val oneToNine = 1..9
Once a range is created, the in operator can be used to test whether a given value is included in the range. This is why the types must be comparable. For a value to be included in a range, it must be greater than or equal to the start value and less than or equal to the end value:
val aToZ = "a".."z"
val isTrue = "c" in aToZ
val oneToNine = 1..9
val isFalse = 11 in oneToNine
Integer ranges (ints, longs, and chars) also have the ability to be used in a for loop. See the section on For loops for further details.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.