Understanding Swift, Kotlin, Java, and JavaScript can really help new mobile developers in today’s fast-changing technology world. Each programming language has its own special purpose and works well for mobile apps.

Swift: This is the main language used for making apps on Apple devices like iPhones and iPads. Swift is easy to read and has strong safety features. This helps developers create strong and user-friendly apps. Knowing Swift means developers can use the latest features and improvements in iOS, which leads to better app experiences for users.

Kotlin: Kotlin is the favorite language for building Android apps. It has many great features compared to Java, like making sure the code is safe from mistakes. By learning Kotlin, developers can make high-quality Android apps that work well and are easier to fix. Plus, Google supports Kotlin officially, which shows how important it is for mobile development.

Java: Even though Kotlin is becoming more popular, Java is still a key language for Android development. Many apps out there were built using Java, so developers need to know it for updating and maintaining those apps. Learning Java also helps developers understand basic programming concepts that can be used in other languages, making them better problem solvers.

JavaScript: This language is great for creating apps that work on both iOS and Android. By using JavaScript, developers can write one code that runs on both platforms, saving time and effort. Also, knowing JavaScript lets developers include web technologies in mobile apps, which expands their skills.

In summary, knowing Swift, Kotlin, Java, and JavaScript gives new mobile developers the tools they need to succeed in different environments and create flexible apps. This knowledge can really help them grow their careers in the exciting field of mobile app development.