Kotlin is a statically typed language, which means that variable types are determined at compile time.

JavaScript is a dynamically typed language, which means that variable types are determined at runtime. It also has some features that make it a good fit for reactive programming. Kotlin is a multi-paradigm language that supports both object-oriented and functional programming styles. JavaScript is a multi-paradigm language that supports both object-oriented and functional programming styles. It also supports functional programming constructs like lambdas and higher-order functions. Kotlin has a similar syntax to Java, but with some added features like null safety and extension functions. It also supports functional programming constructs like anonymous functions and closures. JavaScript has a C-style syntax with curly braces, semicolons, and parentheses. Additionally, unlike JavaScript, Kotlin is a language that supports Method Overloading, which makes the numeric conversion more complex.Key differences between JavaScript and Kotlin Characteristic Kotlin has several numeric types while JavaScript has the Number type only. var kotlinClass = new (undefined) // the Kotlin call will be made using the null keyword JavaScript Undefined & Null maps to Kotlin null literal (or null pointer). tBooleanProperty(enabled) // enabled is converted to Kotlin Boolean Var enabled = false // JavaScript Boolean JavaScript Boolean maps to Kotlin class Boolean.

tStringProperty(text) // text is converted to kotlin.String Var text = 'My Button' // JavaScript string JavaScript String maps to kotlin.String: var kotlinClass = new ()

The article lists the available types in JavaScript and how they are projected to Kotlin.

Java to kotlin conversion online