which is best?

Question

Which one is good for most things? And which is best for performance, machine learning, or readability?

Answer 1

There is no best languages, but good programmers.
General purposes:
- Java / C#
- Python, JavaScript

Performance (OS, Embedded Sys., Games):
- C / C++

Machine learning:
- Python

Answer 2

C++ for machine learning, performance and good for most things. Definitely as it is low level and can even do android apps (with some portability problems but still).
For readability I do not know switch but python is renowned for that

Answer 3

It depends on what you want to do.
For example C, C# and C++ are usually used for game developing and IA codes.
Swift and Objective C are used to develop iOS apps (you can also do some stuff with C++)
To develop Android apps, Java and JavaScript are the best options (even thought people usually think these ones are languages useful just to programm web sites and applets).
Also, python is one of the most used for game developing and IA codes.