Python is a programming language that lets you work more quickly and integrate your systems more effectively.
R is a free software environment for statistical computing and graphics.
Octave is a free version of MATLAB, it can be useful for students who used this language during their studies.
If you are a Data Scientist, chances are that you program in either Python or R!
Julia was designed from the beginning for high performance.
Julia brings a refreshening programming mindset to the Data Science community
Read more: R vs. Python vs. Julia (Published in Towards Data Science)