I have a number assigned to a variable, like that:
var myVar = 1234;
So you want to get the second digit from the decimal writing of a number.
The simplest and most logical solution is to convert is to a string :
var digit = (''+myVar);
var digit = myVar.toString();
If you don't want to do it the easy way, you can do that :
var l = Math.pow(10, Math.floor(Math.log(myVar)/Math.log(10))-1); var b = Math.floor(myVar/l); var digit = b-Math.floor(b/10)*10;
For people interested in performances, I made a jsperf. It turns out that for random numbers using the log as I do is by far the fastest solution.