{"id":8371,"date":"2010-09-20T18:43:34","date_gmt":"2010-09-20T13:13:34","guid":{"rendered":"https:\/\/www.konstantinfo.com\/blog\/?p=8371"},"modified":"2025-12-02T17:46:52","modified_gmt":"2025-12-02T12:16:52","slug":"kotlin-vs-swift","status":"publish","type":"post","link":"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/","title":{"rendered":"See How Kotlin vs Swift Realign and Refurbish Mobile App Development!"},"content":{"rendered":"<p>Excellent tool support and interoperability with Java, Objective C and now Swift act as invaluable hacks for Kotlin programmers. Google\u2019s support and availability of Android Studio for Kotlin have further counterbalanced app development across platforms. This excerpt discusses various features required to leverage Swift knowledge to learn Kotlin, highlighting the similarities and differences between both programming languages. Get a load of Swift code examples and simultaneously walk through towards coding Kotlin equivalents providing an opportunity for developers to get hands-on-experience using their iOS knowledge to construct an Android UI.<\/p>\n<p>Along with some of the parallels like easy syntax, interoperability across platforms, the inheritance of object-oriented features, regular upgrades and less coding; there are some differences between the two languages in a context that drove them apart.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Excellent tool support and interoperability with Java, Objective C and now Swift act as invaluable hacks for Kotlin programmers. Google\u2019s support and availability of Android Studio for Kotlin have further counterbalanced app development across platforms. This excerpt discusses various features required to leverage Swift knowledge to learn Kotlin, highlighting the similarities and differences between both&hellip; <a class=\"more-link\" href=\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/\">Continue reading <span class=\"screen-reader-text\">See How Kotlin vs Swift Realign and Refurbish Mobile App Development!<\/span><\/a><\/p>\n","protected":false},"author":21,"featured_media":8444,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[1404],"class_list":["post-8371","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile-app-development","tag-kotlin-vs-swift","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>See How Kotlin vs Swift Realign and Refurbish Mobile App Development! - Konstantinfo<\/title>\n<meta name=\"description\" content=\"Swift aims to attain its main goal of total world domination by the end of 2019. It forgot about Kotlin, but later remembers that! Watch the debate between Kotlin vs Swift!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"See How Kotlin vs Swift Realign and Refurbish Mobile App Development! - Konstantinfo\" \/>\n<meta property=\"og:description\" content=\"Swift aims to attain its main goal of total world domination by the end of 2019. It forgot about Kotlin, but later remembers that! Watch the debate between Kotlin vs Swift!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/\" \/>\n<meta property=\"og:site_name\" content=\"Konstantinfo\" \/>\n<meta property=\"article:author\" content=\"http:\/\/www.facebook.com\/konstant.info\" \/>\n<meta property=\"article:published_time\" content=\"2010-09-20T13:13:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-02T12:16:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-content\/uploads\/2019\/08\/kotlin-vs-swift-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1008\" \/>\n\t<meta property=\"og:image:height\" content=\"448\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Neeti Kotia\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@konstantinfo\" \/>\n<meta name=\"twitter:site\" content=\"@konstantinfo\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Neeti Kotia\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/\",\"url\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/\",\"name\":\"See How Kotlin vs Swift Realign and Refurbish Mobile App Development! - Konstantinfo\",\"isPartOf\":{\"@id\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/kotlin-vs-swift\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-content\/uploads\/2019\/08\/kotlin-vs-swift-1.jpg\",\"datePublished\":\"2010-09-20T13:13:34+00:00\",\"dateModified\":\"2025-12-02T12:16:52+00:00\",\"author\":{\"@id\":\"https:\/\/www.konstantinfo.com\/konstant-blog\/#\/schema\/person\/f21f3944d0e3bceb3e4884381bb224b9\"},\"description\":\"Swift aims to attain its main goal of total world domination by the end of 2019. 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Her articles primarily focus upon the business, social, cultural, and entertainment side of the technology sector.","sameAs":["http:\/\/www.konstantinfo.com","http:\/\/www.facebook.com\/konstant.info","https:\/\/x.com\/konstantinfo"],"url":"https:\/\/www.konstantinfo.com\/konstant-blog\/author\/neeti-kotia\/"}]}},"show_toc":false,"table_of_content":[{"title":"Enumerating the basic features of Swift and Kotlin:","blog_description":"<h3>Essential Features in Swift<\/h3>\n<ul>\n \t<li>Enumerations are strong point.<\/li>\n \t<li>Data classes are absent.<\/li>\n \t<li>No delegated classes or delegated properties.<\/li>\n \t<li>Absence of annotations.<\/li>\n<\/ul>\n<h3>Essential Features in Kotlin<\/h3>\n<ul>\n \t<li>Classes in Kotlin are final by default.<\/li>\n \t<li>Struct or passing by value are absent.<\/li>\n \t<li>Absence of tuples.<\/li>\n \t<li>No typealias.<\/li>\n \t<li>Guard statements are absent.<\/li>\n<\/ul>\nThe quickness with which both languages gained adoption has helped increase the number of developers for both platforms. Swift was initially developed to work with Cocoa Touch Framework, can be mixed with Objective C in projects but is meant to replace it. <a href=\"https:\/\/www.konstantinfo.com\/kotlin-app-development-company\" target=\"_blank\">Kotlin<\/a> was designed to seemingly interoperate with Java and to make object-oriented features more functional.\n"},{"title":"Understanding the Similar Points in Kotlin and Swift","blog_description":"Let\u2019s share the similarities, and celebrate the differences in Swift and Kotlin in subsequent discussion. Although Swift is a native iOS app development platform, Kotlin can be used for cross-platform app development. With minor adjustments their syntax looks and behaves in same way:\n<div class=\"table-responsive\">\n<table class=\"table-bordered\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th>\n<h3>Similarities<\/h3>\n<\/th>\n<th>\n<h3>Swift<\/h3>\n<\/th>\n<th>\n<h3>Kotlin<\/h3>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Declaring Properties<\/strong> -\nMutable as well as immutable properties can be declared with ease in both Swift as well as Kotlin.<\/td>\n<td>var age: Int = 09\n\nvar firstName = \"Kon\"<\/td>\n<td>var age: Int = 09\n\nvar firstName = \"Kon\"<\/td>\n<\/tr>\n<tr>\n<td><strong>Data Structures<\/strong> \u2013\nArrays can be mutable, are collection of strings but not a mixture of strings and integers. But these are declared with fixed size.<\/td>\n<td>var names = Array&lt;String&gt;()\n\n<strong>To append values:<\/strong>\nnames.append(\"Fuad\") \/\/index 0\nnames.append(\"Eric\") \/\/index 1\nnames.append(\"Joe\") \/\/ index 2\n\n<strong>To declare immutable array:<\/strong>\nlet days = [\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\"]<\/td>\n<td>val numbers = Array&lt;Int&gt;(5){0}numbers[1] = 2 \/\/numbers is now (0, 2, 0, 0, 0)\n\n<strong>Immutable array:<\/strong>\nval days = arrayOf(\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\")\n\n<strong>Lists in Kotlin are similar to Swift\u2019s array type:<\/strong>\n\nvar names = ArrayList&lt;String&gt;() \/\/creates a list of strings, initially with no elements\n\n<strong>Adding Values:\n<\/strong>names.add(\"Neil\") \/\/index 0\nnames.add(\"Joe \") \/\/index 1\nnames.add(\"Eric\") \/\/ index 2\n\n<strong>Declaring an Immutable List:<\/strong>\n\nval days = listOf(\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\")<\/td>\n<\/tr>\n<tr>\n<td><strong>Swift\u2019s Dictionary<\/strong> and <strong>Kotlin\u2019s Map<\/strong> are very useful data structures for storing values.<\/td>\n<td><strong>Creating a Swift Dictionary:\n<\/strong>var namesWithAges : [String: Int] = [:]\nnamesWithAges.reserveCapacity(20) \/\/define capacity<strong>Assigning Values:\n<\/strong>namesWithAges[\"John Doe\"] = 34<strong>Declaring Immutable Dictionary:\n<\/strong>let namesWithAges = [\"John Doe\" : 34, \"Jane Doe\" : 29]<\/td>\n<td>var namesWithAges = HashMap&lt;String, Int&gt;()\n\nvar namesWithAges = HashMap&lt;String, Int&gt;(20) \/\/define capacity\n\n<strong>Assigning Values:<\/strong>\n\nnamesWithAges.put(\"John Doe\", 34)\n\/\/OR\nnamesWithAges[\"John Doe\"] = 34\n\n<strong>While creating immutable map:<\/strong>\n\nval namesWithAges = mapOf(\"John Doe\" to 34, \"Jane Doe\" to 29)<\/td>\n<\/tr>\n<tr>\n<td><strong>High Order Functions<\/strong> \u2013\n\nThese make the code readable and maintainable as these operate on other functions by either taking functions as argument or returning a function.<\/td>\n<td><strong>Prototype of Swift Function:<\/strong>\n\nfunc functionName(parameterName: DataType) -&gt; ReturnType {\n\/\/function body\n}\n<strong>\nAn example of Swift Function:\n<\/strong>func getGreetings(name: String) -&gt; String {\nreturn \"Hello \\(name)!\"\n}\n\n<strong>Swift default argument:\n<\/strong>func getGreetings(name: String = \"World\") -&gt; String {\nreturn \"Hello \\(name)!\"\n}<\/td>\n<td><strong>Prototype of Kotlin Function:\n<\/strong>(1)\nfun functionName(parameterName: DataType): ReturnType {\n\/\/function body\n}\n<strong>(2) Taking Function as Parameter\/argument:\n<\/strong>\nfun passMeFunction(abc: () -&gt; Unit) {\n\/\/ I can take function\n\/\/ do something here\n\/\/ execute the function\nabc()\n}\n<strong>(3) Can return a function:\n<\/strong>\npassMeFunction(\n{\nval user = User()\nuser.name = \"PQR\"println(\"FUNCTIONS ARE EASY\u201d\n}\n)<strong>An example of Kotlin function:\n<\/strong>fun greetUser(name: String): String {\nreturn \"Hello ${name}!\"\n}<strong>Kotlin default argument:\n<\/strong>fun greetUser(name: String = \"World\"): String {\nreturn \"Hello ${name}!\"\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Lambda in<\/strong><strong> Kotlin<\/strong><strong> vs. Closure in Swift<\/strong> are useful building blocks in coding arena.<\/td>\n<td><strong>Closures in Swift:\n<\/strong>var square = { (a: Int) -&gt; Int in\nreturn a * a\n}\nprint(square(4))Taking a cue from above example, in which the type of the variable\u00a0square\u00a0has already been established as an integer, the closure can be re-written as:<strong>\n<\/strong>square = { \/\/we can even omit the parameter list\n$0 * $0\n}\nprint(square(3)) \/\/9<\/td>\n<td><strong>Using a Lambda in Kotlin:<\/strong>\n\nval square = { a:Int -&gt;\na * a\n}\nprintln(square(4)) \/\/16\n\n<strong>Calling a lambda by placeholder object name\u00a0it\u00a0for the parameter:\n<\/strong>var multiple: (Int) -&gt; Int = { it * it }\nprintln(multiple(4)) \/\/16\nmultiple = {it * it * it} \/\/don't need '-&gt;'\nprintln(multiple(2)) \/\/8\n\nCurrying functions enable Lambda calculus, and permits to reduce the function to less complex ones which may already exist in your SDK and help reduce the code.<\/td>\n<\/tr>\n<tr>\n<td><strong>Nullable types and Kotlin vs. Optional types in Swift<\/strong> -\nBoth Kotlin and Swift languages are \u201cSafe\u201d and cannot have Null\/Nill values (by accident).In both these languages such types are represented by a question mark \u201c?\u201d placed to the right of the variable type.<\/td>\n<td><strong>Optional Type in Swift:<\/strong>\n\nvar authToken: String? = \"a long string\"\n\nauthToken = nil<\/td>\n<td><strong>Nullable Type in Kotlin:<\/strong>\n\nvar authToken: String? = \"some long string\"\n\nauthToken = null<\/td>\n<\/tr>\n<tr>\n<td><strong>Null Safety<\/strong> \u2013\n<ul>\n \t<li>\u00a0This is important to avoid the crashes when a null value is accessed.<\/li>\n \t<li>Both languages provide specific syntax for properly unwrapping nullable types.<\/li>\n \t<li>It is not recommended to \u201cforce unwrap\u201d an optional type in Swift (or to use a\u00a0not-null assertion\u00a0for Kotlin\u2019s nullable type) Force unwrapping can be done by making use of an exclamation sign\u00a0\u201c!\u201d\u00a0in Swift and\u00a0\u201c!!\u201d\u00a0in Kotlin.<\/li>\n<\/ul>\n<\/td>\n<td>Swift\u2019s \u201c<strong>Nil-coalescing operator<\/strong>\u201d (introduced in Swift 3) works in the same way as Elvis operator in Kotlin.\n\nlet id: Int? = nil\nvar userId = id ?? -1 \/\/prints -1\n\nBesides, \u201c<strong>if let<\/strong>\u201d expression is also a proper method to handle optionals:\n\nlet id: Int? = nil\nif let userId = id {\nprint(userId)\n} else {\nprint(\"userId is nil\")\n}<\/td>\n<td><strong>Null Safety in Kotlin:<\/strong>\n\nvar id: Int? = 15\nvar userId = 0\nif (id != null) {\nuserId = id\n} else {\nuserID = -1\n}\nprintln(userID) \/\/prints 10\n\n<strong>Kotlin also makes use of Elvis operator to make above situation consice:<\/strong>\n\nvar id: Int? = null\n\nval userId = id ?: -1 \/\/userID is -1\n\nElvis operator does not let Android developers feel the absence of Guard statement in Kotlin.\n\n<strong>Elvis operator can also be used with safe cast:<\/strong>\n\nfun readyForParade (participant : Bandmember) : Boolean {\nval trombonePlayer = participant as?\u00a0 Bandmember ?: return false\nreturn trombonePlayer. practiceTime &gt; 6000\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>\u201cIf Let\u201d expression in Swift vs. \u201cSmart Casts\u201d in Kotlin<\/strong><\/td>\n<td><\/td>\n<td><strong>In Kotlin as the nullable cast gets its correct type or becomes not null, the cast variable can be used directly for rest of scope of program:<\/strong>\n\nval id: Int? = null\nif (id != null) {\nprint(id) \/\/ id can be used directly in this scope\n} else {\nprint(\"id is null\")\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Control Flow\u00a0 -\u201cif-else\u201d statements<\/strong><\/td>\n<td><strong>Swift adopts parentheses, although the basic if-else statement remains same:<\/strong>\n\nif a &gt; b {\nprint(\"Choose a\")\n} else {\nprint(\"Choose b\")\n}<\/td>\n<td><strong>If-else statement in Kotlin is similar to the syntax in most other languages:<\/strong>\n\nif (a &gt; b) {\nprintln(\"Choose a\")\n} else {\nprintln(\"Choose b\")\n}<\/td>\n<\/tr>\n<tr>\n<td>\u201c<strong>Switch<\/strong>\u201d Statement<\/td>\n<td><strong>Swift makes use of \u201cSwitch\u201d as follows:<\/strong>\nlet x = 3\nswitch x {\ncase 1:\nprint(\"x == 1\")\ncase 2:\nprint(\"x == 2\")\ndefault:\nprint(\"x is neither 1 nor 2\")\n}<\/td>\n<td><strong>\u201cSwitch\u201d = \u201cWhen\u201d in Kotlin.<\/strong>\n\nval x = 3\nwhen (x) {\n1 -&gt; println(\"x == 1\")\n2 -&gt; println(\"x == 2\")\nelse -&gt; {\nprint(\"x is neither 1 nor 2\")\n}\n}<\/td>\n<\/tr>\n<tr>\n<td>\u201c<strong>For<\/strong>\u201d Loop<\/td>\n<td><strong>For loop in Swift:<\/strong><strong>\u00a0<\/strong>\n\nlet days = [\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\"]\nfor day in days {\nprint(day)\n}\n\n<strong>Range operator in Swift differs slightly in Swift:<\/strong><strong>\u00a0<\/strong>\n\nfor item in 1..&lt;10 {\nprint(item)\n}<\/td>\n<td><strong>Loops in Kotlin:<\/strong>\n\nval days = arrayOf(\"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\", \"Sun\")\nfor (day in days) {\nprintln(day)\n}\n\n<strong>For Loop by making use of \u201crange operator\u201d:<\/strong><strong>\u00a0<\/strong>\n\nfor (item in 1..10) {\nprintln(item)\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Declaring a class<\/strong> \u2013 is almost same in Kotlin and Swift<\/td>\n<td><strong>Example of class declaration in Swift:<\/strong>\n\nclass ViewController: UIViewController {\n\n}<\/td>\n<td><strong>Example of class declaration in Kotlin:<\/strong>\n\nclass MainActivity: AppCompatActivity() {\n\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Constructor in Kotlin vs. Initializer in Swift <\/strong><\/td>\n<td><strong>Example of Initializer in Swift:<\/strong>\n\npublic class Car {\nlet model: String\n\ninit(model: String) {\nself.model = model\n}\n}<\/td>\n<td><strong>Example of Constructor in Kotlin:<\/strong>\n\nclass Car constructor(_model: String) {\nval model: String\n\ninit {\nmodel = _model\n}\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Extensions<\/strong> \u2013 help in extending the existing features of a class.<\/td>\n<td><strong>\u201cInt\u201d class with a functions that returns square of an integer can be extended in Swift as:<\/strong>\n\nextension Int {\nfunc square() -&gt; Int {\nreturn self * self\n}\n}\n\nprint(5.square()) \/\/prints 25<\/td>\n<td><strong>\u201cInt\u201d class with a functions that returns square of an integer can be extended in Kotlin as:<\/strong>\n\nfun Int.square(): Int {\nreturn this * this\n}\n\nprintln(5.square()) \/\/prints 25<\/td>\n<\/tr>\n<tr>\n<td><strong>Interface in Kotlin vs. Protocol in Swift<\/strong><\/td>\n<td><strong>Representation of Protocol:\n<\/strong>protocol Animal {\nvar canFly: Bool {get}func eat()func makeSound()\n}<\/td>\n<td><strong>Representation of Interface:\n<\/strong>interface Animal {\nvar canFly: Booleanfun eat()fun makeSound()\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Default Implementation<\/strong><\/td>\n<td>protocol Animal {\nvar canFly: Bool {get}\n}extension Animal {\nvar canFly: Bool {\nreturn false\n}\n}<\/td>\n<td>interface Animal {\nval canFly: Booleanget() = true\n}<\/td>\n<\/tr>\n<tr>\n<td><strong>Functional Programming Tools<\/strong><\/td>\n<td>compactMap, map, filter<\/td>\n<td>filterNotNull, map, filter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n"},{"title":"Figure Out the Differences: Kotlin vs Swift?","blog_description":"<div class=\"table-responsive\">\n<table class=\"table-bordered\" width=\"100%\" cellspacing=\"0\" cellpadding=\"0\">\n<thead>\n<tr>\n<th>\n<h3>Dissimilarities<\/h3>\n<\/th>\n<th>\n<h3>Swift<\/h3>\n<\/th>\n<th>\n<h3>Kotlin<\/h3>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u201cData Class\u201d in Kotlin vs. \u201cStruct\u201d in Swift<\/strong><\/td>\n<td><strong>Example of Struct declaration in Swift:<\/strong>\n\nstruct Person {\nlet name: String\nlet dob: String\n}\n\nlet personOne = Person(name: \"Jon\", dob: \"12 August\")\nvar personTwo = personOne \/\/ assign to another variable\npersonTwo.name = \"Vanessa\"\nprint(personOne.name) \/\/ prints Jon\nprint(personTwo.name) \/\/ prints Vanessa<\/td>\n<td><strong>Example of Data Class declaration in Kotlin:<\/strong>\n\nval personOne = Person(\"ALI\", \"11 November\")\nval personTwo = personOne \/\/ assign to another variable\n\npersonTwo.name = \"Vanessa\"\nprintln(personOne.name) \/\/ prints Vanessa\nprintln(personTwo.name) \/\/ prints Vanessa<\/td>\n<\/tr>\n<tr>\n<td><strong>\u201cVal\u201d in Kotlin vs. \u201cLet\u201d in Swift<\/strong><\/td>\n<td><strong>Example of \u201cLet\u201d in Swift:<\/strong><strong>\u00a0<\/strong>\n\nlet persons = [Person(name: \"Jonathan\", dob: \"12 Sept\"),\nPerson(name: \"Kimono\", dob: \"20 July\"),\nPerson(name: \"Venu\", dob: \"10 August\"),\nPerson(name: \"Alena\", dob: \"27 Feb\")]\npersons.append(Person(name: \"Shaun\", dob: \"11 Jan\")) \/\/ throws compile time error<\/td>\n<td><strong>Example of \u201cVal\u201d in Kotlin:<\/strong><strong>\u00a0<\/strong>\n\nval persons = mutableListOf(Person(\"Jon\", \"12 August\"),\nPerson(\"Kim\", \"10 July\"),\nPerson(\"Vanessa\", \"12 August\"),\nPerson(\"Alisa\", \"26 March\"))\npersons.add(Person(\"Shaun\", \"11 Jan\")) \/\/ can append a new value<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n"},{"title":"Follow the Footprint: Kotlin\u00a0vs\u00a0Swift","blog_description":"Both Kotlin and Swift can be used to develop across platforms, share many features, are highly performant, are used for server-side development, treat declaration of properties, data structures, functions in a similar way; they require programmers to declare variables, classes, and control flow (if-else, for-loop) properly.\n\nWhile constructor, immutable variables, mutable variables, self-object referencing, arrays, dictionaries\/maps, type inference, function declaration, function default parameters, If statements, For loops, Default values, Safe casting, Safe call, Force unwrap, lazy initialization are major points of differences. (Few of these are discussed above)\n\nFrameworks that ease Swift coding include ABI stability, SwiftNIO HTTP2 support, Vapor 4, Swift Package Manager &amp; Xcode, Marzipan - Phase 2, Kitura and theswiftdev.com. Use of Android Studio 3.0 as IDE with fully tested Kotlin support enables developers to make extensive use of Kotlin at website backend. Moreover, it also chalks out the heavy use of kotlin at backend of services for the platforms (OS) the developers are trying to target. While JVM is the most common, Android closely follows it. Spring Boot, Kotlin-Native, Scade, Kotlinx.coroutine, Kotlin.test, Ktor, Anko Commons, Kotlinx.html, Exposed, Anko Coroutines, Anko Layouts, Kotlinx.dom, etc are the most prevalent frameworks that ease creating a mobile app in Kotlin. Quell any signs of dissent, by <a href=\"https:\/\/www.konstantinfo.com\/contact-us\">talking to our experts<\/a> on Kotlin and <a href=\"https:\/\/www.konstantinfo.com\/swift-app-development-company\" target=\"_blank\">Swift app development<\/a>."}],"faq":[],"related_blogs":[{"id":12341,"title":"AI in Real Estate Industry &#8211; Benefits, Use Cases, Applications and Challenges","slug":"ai-in-real-estate","link":"https:\/\/www.konstantinfo.com\/konstant-blog\/ai-in-real-estate\/","modified":"2026-05-07 17:49:19","excerpt":"The real-estate industry is predominantly run by human expertise and manual processes including buying, selling, and building lands and property....","image":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-content\/uploads\/2025\/04\/ai-in-real-estate.webp"},{"id":12324,"title":"10 Top Education App Development Companies (2026)","slug":"education-app-development-companies","link":"https:\/\/www.konstantinfo.com\/konstant-blog\/education-app-development-companies\/","modified":"2026-05-07 15:22:39","excerpt":"What started as an extension of traditional classrooms became a billion-dollar industry. 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It...","image":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-content\/uploads\/2025\/04\/education-app-development-companies.webp"},{"id":12333,"title":"10 Best eCommerce App Development Companies (2026)","slug":"ecommerce-app-development-companies","link":"https:\/\/www.konstantinfo.com\/konstant-blog\/ecommerce-app-development-companies\/","modified":"2026-05-05 17:18:51","excerpt":"We have curated a comprehensive list of top eCommerce app development companies to assist you in developing top-notch eCommerce applications....","image":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-content\/uploads\/2025\/04\/best-ecommerce-app-development-companies.webp"}],"_links":{"self":[{"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/posts\/8371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/comments?post=8371"}],"version-history":[{"count":2,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/posts\/8371\/revisions"}],"predecessor-version":[{"id":12780,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/posts\/8371\/revisions\/12780"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/media\/8444"}],"wp:attachment":[{"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/media?parent=8371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/categories?post=8371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.konstantinfo.com\/konstant-blog\/wp-json\/wp\/v2\/tags?post=8371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}