How to convert string equation to number in javascript?

Question

How to convert string equation to number in javascript?

Say I have \"100*100\" or \"100x100\" how do I evaluate that and convert to a number?

Answer 1

This will give you the product whether the string is using * or x:

var str = "100x100";

var tmp_arr = str.split(/[*x]/);
var product = tmp_arr[0]*tmp_arr[1];   // 10000