Help with ゃったって and なん

Question

I need help to understand some grammar in this sentence

何度ゃったって
結果は同じだ
それが世界の真理なんだ

So I translated it for "no matter how many times I will try, the result will be the same. that's the truth of this world"

But there are two things that I don't understand here:

1. ゃったって? where it came from? te iru form of やる (to do)? Because I know there is どうゃったって - what do you saying

2. なんだ? is that to explain ton or something?

Thanks, Or

Answer 1

Why is your translation spot-on if you do not understand two parts of the original?

This 「って」 is the colloquial form of 「とて」, which means "even if".

https://jisho.org/search/%E3%81%A8%E3%81%A6

「なんだ」 is the colloquial form of 「なのだ」, which is a sentence-ender expressing a firm kind of declaration/affirmation.