There are may languages and tools for Data Science, which is the most recommended one: Mathematica, Matlab, R, Python, Java?
Some useful Resources:
https://analyticsindiamag.com/top-10-programming-languages-data-scientists-learn-2018/
https://www.mathworks.com/products/matlab/matlab-vs-python.html
https://www.quora.com/Why-is-Python-a-language-of-choice-for-data-scientists
https://www.researchgate.net/post/Which_is_the_best_programming_language_for_data_science_and_big_data