how to convert binary string to decimal?

Question

I want to convert binary string in to digit E.g

var binary = \"1101000\" // code for 104
var digit = binary.toString(10); // Convert String or Digit (But it          


        

Answer 1

I gathered all what others have suggested and created following function which has 3 arguments, the number and the base which that number has come from and the base which that number is going to be on:

changeBase(1101000, 2, 10) => 104

Run Code Snippet to try it yourself:

function changeBase(number, fromBase, toBase) {
                        if (fromBase == 10)
                            return (parseInt(number)).toString(toBase)
                        else if (toBase == 10)
                            return parseInt(number, fromBase);
                        else{
                            var numberInDecimal = parseInt(number, fromBase);
                            return (parseInt(numberInDecimal)).toString(toBase);
                    }
}

$("#btnConvert").click(function(){
  var number = $("#txtNumber").val(),
  fromBase = $("#txtFromBase").val(),
  toBase = $("#txtToBase").val();
  $("#lblResult").text(changeBase(number, fromBase, toBase));
});

#lblResult{
  padding: 20px;
}

Hint: 

Try 110, 2, 10 and it will return 6; (110)2 = 6


or 2d, 16, 10 => 45 meaning: (2d)16 = 45

or 45, 10, 16 => 2d meaning: 45 = (2d)16

or 2d, 2, 16 => 2d meaning: (101101)2 = (2d)16

FYI: If you want to pass 2d as hex number, you need to send it as a string so it goes like this: changeBase('2d', 16, 10)