K is a programming language used for system programming, data analysis, and general purpose programming. It was developed by Arthur Whitney and released in the early 1990s. The language is closely related to the APL language, which it superseded.

K is an interpreted language that focuses primarily on functional programming. It is also an imperative language, allowing for the use of iterative operations and complex data structures. K features an interactive environment, making it easy to test functions and debug errors.

K is an array-oriented language with an extremely concise syntax, allowing for the creation of large and complex programs with few lines of code. The implementation of functions is simplified, as they can be easily assigned to variables. In addition to its simple syntax, K also supports a wide range of data types, such as integers, characters, characters arrays, floats, and other objects.

K has numerous applications within data science, machine learning, and artificial intelligence. It is the only language specifically designed for time-series analysis, helping to quickly and accurately analyze complex time-series data. The language also supports scientific computing, allowing for the manipulation of images, matrices, and large tables. In addition to its scientific applications, K is also used in financial applications, such as stock market analysis and investment decisions.

In terms of language skills, K is one of the easiest languages to learn due to its simple syntax and intuitive interface. It is well-documented and supported, providing both a strong community of helpful users and commercial support.

K is an extremely powerful language, designed to make complex tasks simpler. It is readily available, free to use, and comes with a built in REPL (Read–eval–print loop) which allow users to test code and prototype their programs. The language can create standalone functions, and it supports libraries, distributed computing, and web applications. There are several implementations of K, allowing it to run on different operating systems and hardware architectures.

Overall, K is an incredibly powerful and user-friendly programming language that is perfect for anyone looking to work in data science or other fields where time-series analysis or complex scientific computation is required.