How does procedural level up works in games?

Questions & Answers
1

I see games that has infinite level up, what is the best math equation for leveling up in games in terms of xp and enemies damage?

Thanks in advance.

2

I don’t have any exact favorite opinion, but I do use a formula that seems to work with xp and infinite level up. In terms of xp, I usually start by having the main character get around 100 xp to level up. When the person levels up, I multiply the threshold by 2(now 20 at lvl 2), and, every level up, I increase the amount the threshold is increased(at level 1->2) by one. Example:
At level one:
-100 xp required to level up, multiplier at 2.
At level two:
-200 xp required to level up, multiplier at 3.
At level three:
-600 xp required to level up, multiplier at 4.
and etc.