An interface from kotlin.ranges package called ClosedRange is a base declaration that models the idea of the range. The idea of a range itself can be seen as an abstract data type that models a closed scope of values or a set of objects that can be iterated through, in a concise way. Let’s get started 🚀! Iterating through primitive types Next, we are going to implement a custom progression for the LocalDate class. First, we are going to discover built-in range implementations for the integral types like Char, Int or Long. In this post, we are going to explore how to use range expressions in action. * created by Chaitanya for Beginnersbook.In order to make the syntax for loop iteration and control flow statements safe and natural to read, Kotlin standard library provides a concept of range. We can reverse a range in Kotlin using reversed() function. However if we want a specific interval like 3 then we can define the range like this 1.10.step(3) this way the values would be 1 4 7 10. By default the value of step is 1 so when we create range 1.10, it is 1, 2, 3.10. With the help of step() function we can define the interval between the values. we can use these functions rangeTo() and downTo(), rangeTo() is for increasing order and downTo() is for decreasing order. Println('3 in oneToTen: $')ġ1 in oneToTen: false Kotlin Range: rangeTo() and downTo() functions Lets see how to do this with the help of a simple example. We can also check whether a particular element is present in the range or not. We are cycling through the elements of the ranges using for loop. In the following example, we have created two ranges, one is an integer range and other one is a character range.

We can also create ranges in reverse order and several other things with ranges. Similarly we can create character ranges such as ‘A’.’D’ which will create a series of values A, B, C, D. For example a range of 1.5 would create a series of values 1, 2, 3, 4, 5. With the help of ranges in Kotlin we can easily create a list of sequence by specifying starting and ending value.

In this guide, we will discuss the very cool feature of Kotlin which is ranges.

Kotlin for in range