I’d recommend learning Python. It is widely used in industry. It is one of the easier languages to learn, and it has a simple syntax compared to Java or C++. I’d recommend learning Python using Lynda.com. Lynda.com is free with a university login and offers over a hundred Python courses. There are also plenty of other online resources such as Codecademy.
I would have to agree with Owen. Python was my first experience coding and I thought it was a great language to start with because it is simple syntax and easy to use. I would recommend taking an introductory course either online or at school to get started. Khan Academy is a cool free option for quick tutorial videos
I agree with the above two replies but would also like to add that R is a very useful tool for data handling and analysis. While it might not be the first language I would recommend that you learn, I definitely think that you should have it in your arsenal of programming tools. Swirl-package and data camp are great tools to learn R.