A program to find the probability of catching a Pokemon in an Escalator Battle (in Pokemon Shuffle (Mobile)) within a specific number of stage levels

Pokemon Shuffle Escalation Battle Catch Probability.js

// A program to find the probability of catching a Pokemon in an Escalator Battle (in Pokemon Shuffle (Mobile)) within a specific number of stage levels
// This program is actually a very long-winded way of making this calculation, because you can do the same thing with the formula 1-(99!/(99-n)!/100^n) where n is the number of attempts: https://www.reddit.com/r/PokemonShuffle/comments/44vd9u/diancie_escalation_hp_graph_and_stats/czxjwmz/
// The simplest way to run this program is to open it in or copy it into Mozilla Firefox's Scratchpad (Firefox Menu > Developer > Scratchpad or Shift+F4) and hit 'Run'. The result will pop up in a window in your open tab.

// n is the number of levels which have been attempted
// 1 is the initial value for the program
var n = 1
// p is the probability of it taking n attempts to catch the Pokemon
// 0.01 is the initial value for the program
var p = 0.01
// q is the probability of it taking n attempts or less to catch the Pokemon
// 0.01 is the initial value for the program
var q = 0.01

// SET n <= number TO THE NUMBER OF ATTEMPTS WHICH YOU WANT TO FIND THE PROBABILITY FOR (e.g. n <= 11)
for (n = 2; n <= 11; n++) {
p = (0.01*n) * (p/(0.01*(n-1))) * (1-(0.01*(n-1)));
q = q + p
}

window.alert(q)