How many programming languages should I learn for becoming a successful programmer? And what are they?

Question

Please tell me how many programming languages should I learn to become a successful Programmer. And of what type?

Answer 1

you might become a successful programmer with the knowledge of only one programming language. the number is not the deciding point.

Answer 2

all the languages on this app are good to know

Answer 3

You rather need to know the principles behind writing code, these are problem solving, algorithms, object oriented design, data structures and so on

Because in the end these are common across all languages and also if you know these, then there is no problem learning any language. Languages only differ in syntax and several features, but the fundamentals are always same.