How can I convert binary float number into a decimal float number ?

Udara chathuranga

14 New Member

Aug 16 '10 #1

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Dormilich

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Recognized Expert Moderator Expert

you do this as integer via parseInt() by passing the input’s radix (second parameter). (binary numbers usually ain’t floats)

Aug 16 '10 #2

Udara chathuranga

New Member

I am a beginner.So can you explain this that answer with an example.
Thanks

Aug 17 '10 #3

Dormilich

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Recognized Expert Moderator Expert

in JavaScript there is exactly one number type: float (IEEE 774). that is, a binary number must be a string consisting of 0s and 1s. for string conversion you have 3 methods:
- Number() (the constructor for the Number objects)
- parseFloat() (parse a string into a float (obviously a decimal float))
- parseInt() (parse a string as integer into a float using the given radix)

thus if you have any number that’s not decimal, you have to apply parseInt(), as that’s the only function where you can set the radix.

Aug 17 '10 #4

Udara chathuranga

New Member

Thank you sir I understood.
But please check is it possible to develope the script below, to convert binary float number in to decimal float number.

Expand|Select|Wrap|Line Numbers

 <html xmlns="http://www.w3.org/1999/xhtml"> 

     <head></head>

  <body>

 <script type="text/javascript">

   function ConvertToBinary(){

        var numberValue = document.getElementById('NumberInput').value;

       var decNumber = Number(numberValue);

         var binaryNumber = decNumber.toString(2).toUpperCase();
 
         document.getElementById('Result').value = binaryNumber;

       }

       function ConvertToDec(){

         var binaryNumber = document.getElementById('NumberInput').value;

       var decNumber = parseInt(binaryNumber, 2);

         document.getElementById('Result').value = decNumber;

      }

    </script>
 
     <div style="text-align:center">

       Number: <input type="text" id="NumberInput"></input>

       Result: <input type="text" id="Result"></input>

      <br/>

      <button onclick="ConvertToBinary();">Convert To Binary</button>

      <button onclick="ConvertToDec();">Convert To Decimal</button>

     <br />

    </div>

   </body>

 </html>

Aug 17 '10 #5

Dormilich

8,658

Recognized Expert Moderator Expert

there’s one important thing you forgot:

© 2010 Frinavale

if you copy, copy right (pun intended)

Aug 17 '10 #6

Udara chathuranga

New Member

Thank you sir I understood.
But please check is it possible to develope the script below, to convert binary float number in to decimal float number.

Expand|Select|Wrap|Line Numbers

     <html xmlns="http://www.w3.org/1999/xhtml"> 

         <head></head>

     <body>

  <script type="text/javascript">

     function ConvertToBinary(){

     var numberValue = document.getElementById('NumberInput').value;

         var decNumber = Number(numberValue);

          var binaryNumber = decNumber.toString(2).toUpperCase();
 
         document.getElementById('Result').value = binaryNumber;

         }

       function ConvertToDec(){

        var binaryNumber = document.getElementById('NumberInput').value;

        var decNumber = parseInt(binaryNumber, 2);

         document.getElementById('Result').value = decNumber;

       }

    </script>
 
      <div style="text-align:center">

        Number: <input type="text" id="NumberInput"></input>

        Result: <input type="text" id="Result"></input>

      <br/>

       <button onclick="ConvertToBinary();">Convert To Binary</button>

       <button onclick="ConvertToDec();">Convert To Decimal</button>

       <br />

     </div>

   </body>

  </html>

Aug 19 '10 #7

Dormilich

8,658

Recognized Expert Moderator Expert

I would assume Frinavale doesn’t publish code that’s not working.

Aug 19 '10 #8

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