What (general) programing language can i use to develop an application, that can run on both iphone and android

Question

application

Answer 1

I think you can do it with javascript .But of course html and css is needed.
You can have a look at this article to know more:
https://medium.com/javarevisited/top-5-programming-languages-for-mobile-app-development-in-2021-19a1778195b8#:~

Answer 2

c# with xamarin forms can be a good option as well