Need to understand a Javascript Function

Question

I am Python programmer and know least about Javascript.

Can someone please explain what this function (test) means in javascript?

Thank you

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;
}

Answer 1

split reverse sort , Math.pow , etc are pre defined functions used in JavaScript. Google to learn more about these. More over, if you are good in programming, then these are just math equations.

You can do a console.log or alert like console.log(var_arr); alert(var_arr); after each line and see what result it gives.

Example fiddle