Is kotlin and swift similar to javascript? And can we use html css js elements for app development?

Question

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Answer 1

It depends on how loose you are with the term "similar". They have loops, and functions and things like that.
As for the app development question, check here:

https://www.sololearn.com/discuss/242006/?ref=app
https://www.sololearn.com/discuss/1119559/?ref=app
https://www.sololearn.com/discuss/415930/?ref=app

Answer 2

Yes, and Not.

Kindly ask the question precisely.