Kotlin Lists | Use Lists in Kotlin | How to use Lists in Kotlin Android | Mutable List Kotlin

Kotlin lists A list is a generic ordered collection of elements. Kotlin has two types of lists, immutable lists (cannot be modified) and mutable lists (can be modified). Read-only lists are created with listOf() whose elements can not be modified and mutable lists created with mutableListOf() method where we alter or modify the elements of the list. Kotlin program of list contains Integers – Each element of a list has an index. The first element has an index of zero (0) and the last Element has index len – 1, where ‘len’ is the length of the list.

Use Lists in Kotlin It's common to make lists for all sorts of situations in your everyday life such as a list of things to do, a list of guests for an event, a wish list, or a grocery list. In programming, lists are also very useful. For example, there could be a list of news articles, songs, calendar events, or social media posts within an app.

Learning how to create and use lists is an important programming concept to add to your toolbox, and it will enable you to create more sophisticated apps.

In earlier codelabs, you learned about basic data types in Kotlin such as Int, Double, Boolean, and String. They allow you to store a certain type of value within a variable. But what if you want to store more than one value? That is where having a List data type is useful.

A list is a collection of items with a specific order. There are two types of lists in Kotlin:

Read-only list: List cannot be modified after you create it.
Mutable list: MutableList can be modified after you create it, meaning you can add, remove, or update its elements.

When using List or MutableList, you must specify the type of element that it can contain. For example, List holds a list of integers and List holds a list of Strings. If you define a Car class in your program, you can have a List that holds a list of Car object instances. Introduction to Mutable Lists

Mutable lists are lists that can be modified after creation. You can add, remove, or change items. You can do everything you can do with read-only lists as well. Mutable lists are of type MutableList, and you can create them by calling mutableListOf(). Create a MutableList

Delete the existing code in main().
Within the main() function, create an empty mutable list and assign it to a val variable called entrees.

val entrees = mutableListOf()

This results in the following error, if you try to run your code.

Not enough information to infer type variable T

As mentioned earlier, when you create a MutableList or List, Kotlin tries to infer what type of elements the list contains from the arguments passed. For example, if you write listOf("noodles"), Kotlin infers that you want to create a list of String. When you initialize an empty list without elements, Kotlin cannot infer the type of the elements, so you have to explicitly state the type. Do this by adding the type in angle brackets right after mutableListOf or listOf. (In documentation, you may see this as where T stands for type parameter).

in this tutorial we are going to learn about list and mutable list in kotlin android Follow my Facebook Page : https://www.facebook.com/105940115222549 Follow me on Instagram : https://www.instagram.com/p/CViUlw2sOMi Follow me on tumblr : http://programming-guru.tumblr.com Follow me on reddit : https://www.reddit.com/u/Programming_guru1?utm_medium=android_app&utm_source=share

Kotlin Lists | Use Lists in Kotlin | How to use Lists in Kotlin Android | Mutable List Kotlin Kotlin Lists | Use Lists in Kotlin | How to use Lists in Kotlin Android | Mutable List Kotlin Kotlin Lists | Use Lists in Kotlin | How to use Lists in Kotlin Android | Mutable List Kotlin

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