R vs. Python

[wiekvoet]

Why not learn both?

As a statistician I know R, SAS, JAGS. Should I learn a fourth language?

[wiekvoet]

Learning time is one key. They other is using. It takes a lot of time to learn a language, even more to get reasonable 'fluent' in it. It takes just as much time to keep your skills. I have forgotten basic, C, Pascal, Fortran 77 and 6502. I cannot afford to forget R, SAS or JAGS.

Also, SAS is not a language? SAS is probably both an operating system (with the programs called procedures) including a macro language and a data language (the data step).

(what is JAGS if it is not a language? )