How to write a program?

Question

in any language

Answer 1

You first need to learn the syntax of a language.
Than you wil, know how to a program in that language.
Sololearn teaches the basic syntax for:
- Python
- Ruby
- JavaScript
- C++
- C#
- Java
- PHP
- Swift

If you are a begginer I suggest you start with Python.

Answer 2

To follow up the answer of Ulisses, If you want to try one of those languages try the code playground features of the sololearn or install an IDE in particular of that programming language.

Answer 3

in addition you should have an editor for a particular language