Programmers need to learn all those codes?

Question

A programmer have to learn all those codes? otherwise how can he programme and how to learn all those codes?

Answer 1

No you don't need to learn every programming language.

For web development learn
Front-end : Html, CSS, JavaScript, jQuery.
Back-end : Php, C#(ASP.net web api, mvc).

For software development learn
Windows : C++, C#.
Android : Java, C#(Xamarin).
IOS : swift, C#(Xamarin).
Robotics : python.

There are more. I don't know much. ;P

Answer 2

@Daniel those are not codes they are called data-types. And Yes, you have to understand these basic data-types.

Answer 3

i didn't refer to languages but to codes, i mean, every single word, array, integer, all the things that programming language holds.