--- title: "Dynamic and Static Typing" description: "Dynamic and Static Typing" author: "Tarun Kumar" published: 2015-09-16 updated: 2020-09-18 canonical: https://www.mindstick.com/interview/22830/dynamic-and-static-typing category: "iphone" tags: ["iphone", "ios", "objective c"] reading_time: 2 minutes --- # Dynamic and Static Typing Static typed languages are those in which type checking is done at compile-time, whereas dynamic typed languages are those in which type checking is done at run-time. Static typed variables need not be defined before they’re used. This implies that static typing has to do with the explicit declaration (or initialization) of variables before they’re employed. \ Objective-C is a dynamically-typed language, meaning that you don’t have to tell the compiler what type of object you’re working with at compile time. Declaring a type for a varible is merely a promise which can be broken at runtime if the code leaves room for such a thing. You can declare your variables as type id, which is suitable for any Objective-C object. ## Answers ### Answer by Tarun Kumar Static typed languages are those in which type checking is done at compile-time, whereas dynamic typed languages are those in which type checking is done at run-time. Static typed variables need not be defined before they’re used. This implies that static typing has to do with the explicit declaration (or initialization) of variables before they’re employed. \ Objective-C is a dynamically-typed language, meaning that you don’t have to tell the compiler what type of object you’re working with at compile time. Declaring a type for a varible is merely a promise which can be broken at runtime if the code leaves room for such a thing. You can declare your variables as type id, which is suitable for any Objective-C object. --- Original Source: https://www.mindstick.com/interview/22830/dynamic-and-static-typing Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.