In contrast to Java, which includes null variables and objects, Kotlin does not have such concepts. For example, we can have a simple function that returns a List of three numbers and then print them all using forEach: You can get the full code from here.

Unlike Java, which doesn’t support extension functions, Kotlin enables users to construct their own. Multiple values can be represented in Kotlin using collections. On the other hand, forEach makes your code more concise and easy to read. Java is usually used for creating enterprise apps, whereas Kotlin is used to develop Android applications. We can also do the same with the for loop, but using multiple for loops can quickly make your code messy. If the data source is an iterable collection, forEach would be better, as it could be chained together. While the first range will hold the list of multipliers corresponding to different rows, on the other hand, the second range will hold the result values. In computer programming, foreach loop (or for-each loop) is a control flow statement for traversing items in a collection. Kotlin forEach is an iteration loop that allows you to access items of a collection or list and perform actions on each item. Further, we’ll need two ranges in our loop.

Let’s advance our understanding of looping with multiple variables by applying concepts of ranges and the zip operator to generate multiplication tables, where each row shows up in the format: factor x multiplier = resultĪs the factor will remain the same in all the rows, we’ll have to loop through two multiplier and result variables.

For each in kotlin