I wrote the following JavaScipt code which converts a binary number into a decimal number:

(function bin_dec(num) {

  var x = num;

  var result = 0;

  for (var i = 0; i < x.length; i++) {

    result += eval(x[x.length - i] * 2^i);

  }

  return result;

})()

I want to be able to run this code from the command-line. The filename is converter.js and I am running the command prompt window in the same directory as the file. I am trying to run this code using 01001100 as the function argument. Here are my attempts:

$ converter.js 01001100

and

$ converter.js -01001100

and

$ converter.js bin_dec(01001100)

But unfortunately, neither of these works. Can somebody please point out my mistake? Thanks in advance.