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Welcome to kotlin Series In this post, we are going to discuss a very important topic of Kotlin. The topic is kotlin null safety. I think you already heard this keyword, null safety, Kotlin is a null safety language. right? what is the null safety? In kotlin by default, you can not assign a value of a variable as null. All the variable must have a value. but if you want an assign a variable as null, you have to use? code- val nullValue:String? = null if you want to create...

welcome to kotlin series. Kotlin Series In this series, we are basically going through some basic and advanced tutorial about kotlin language. we try to serve you best practices on those tutorials. Here is the collection of all post 1. String -  kotlin string tutorial 2. Array and loop - array and loop tutorial 3. File reader and write - kotlin...

Welcome to kotlin Series In the tutorial, we are going to discuss Kotlin collection. we touch on below topics 1. Hashmap 2. Array 3. List        3.a. mutable list        3.b. immutable list 4. Set        4.a. mutable set        4.b. immutable set Let's start- Hashmap: In kotlin, we can use java hashmap easily. But kotlin has an own hashmap. First, we go through Java hashmap create an instance of Hashmap class...

Welcome to kotlin Series In this small post, we are going to discuss how to control loop in Kotlin. Basically, we use 2 keywords for the control loop. 1. continue 2. break if we want to skip one process, then we use to continue the keyword for (a in 1..5){ if (a==4){ continue } println("A: $a") } Output: A: 1 A: 2 A: 3 A: 5 or if we stop the loop then we use break keyword for (a in 1..5){ if (a==4){ break } println("A: $a") } Output: A:...

Welcome to kotlin Series In this post, we are going to learn about ArrayList. In android the use of ArrayList is huge. So let's move on today task list. 1. we create an ArrayList 2. insert some value 3. update some value 4. search in ArrayList 5. delete some value Let's start: Note: we discuss array and loop in this post Kotlin: Array and Loop. you can take a look at this post of...

Welcome to kotlin Series In this post, we are going to learn about kotlin IO (input or output) we basically learn about file reader and writer. In this post, we are going to write a program that takes text from the console and save it on computer hard disk as a text file. Let start- First, we are going to create a method for saving file, method name writeToFile Follow those step: 1....

Welcome to this post. In this post, we are going to discuss how to share code on Git from Android Studio. (I don't want to describe what is GitHub or why you need to use git. I just want to show you the process only) Let's jump in. Before share, you need to create a GitHub account click here for GitHub account. After creating a GitHub account, you can now share your code into GitHub. Open android...