Need to understand a Javascript Function -

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i python programmer , know least javascript.

can please explain function (test) means in javascript?

thank 

function test(var1)  {      var var_str=""+challenge;      var var_arr=var_str.split("");      var lastdig=var_arr.reverse()[0];      var mindig=var_arr.sort()[0];        answer=answer+subvar2;      return answer; }

split reverse sort, math.pow, etc pre defined functions used in javascript. google learn more these. more over, if in programming, these math equations.

you can console.log or alert console.log(var_arr); alert(var_arr); after each line , see result gives.

example fiddle


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