# binary « number « Javascript Data Type Q&A

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 Javascript Data Type Q&A » number » binary

### 1. Is there "0b" or something similar to represent a binary number in Javascript    stackoverflow.com

I know that `0x` is a prefix for hexadecimal numbers in Javascript. For example, `0xFF` stands for the number 255. Is there something similar for binary numbers ? I would expect `0b1111` ...

### 2. How to convert a floating point number to its binary representation (IEEE 754) in Javascript?    stackoverflow.com

What's the easiest way to convert a floating point number to its binary representation in Javascript? (e.g. 1.0 -> 0x3F800000). I have tried to do it manually, and this works to some ...

### 3. Retrieving the actual binary value of a JavaScript number value?    stackoverflow.com

In JavaScript, for a given property containing a Number value, is it possible to retrieve the actual binary value - the 64 bits representing the value. var x = 13; What 64 bits ...

### 4. javascript inverting a binary value of a number     stackoverflow.com

i would like first to convert a number to binary, then invert it bitwise .. like this : number is 793 = 1100011001 then convert the binary value into : 0011100110 in javascript i ...

### 5. Regular Expression Javascript binary number validation    stackoverflow.com

i am trying to convert binary to decimal value I am need a regular expression for validating the binary number.

``````//for now i am using

var binary="1234"

/^-{0,1}\d+\$/g.test(binary)

//my output:

1
``````
but i want the output ...

### 6. compress/urlencode a series of 100 base-4 numbers in javascript    stackoverflow.com

First thing: must be done entirely in javascript. (JQuery/mootools optional) I have a series of 100 numbers each set 0,1,2, or 3 - these represents settings on the page. I would like ...

### 7. Error converting a binary number to ASCII-text with JS    stackoverflow.com

Where is the ERROR?? I want to convert a binary number to ASCII-text. The result is not so good. Or is this code correct? for example

``  01010111011010010111001000100000011000100110 01010110011101101001011011100110111001100101 01101110001000000110110101101001011101000010 00000110010101110100011101110110000101110011 00100000011001010110100101101110011001100110 ...``

### 8. Trying to randomly display a pop up but the image is in binary numbers    codingforums.com

Hi All, I have a javascript file that displays a pop up image on the website. This works fine to display the one logo.png file even though the logo.png file is not referenced in the javascript. I believe it does it through the binary numbers. What I really need is to have 6 images and for the script to randomly select ...

### 10. coding up a binary number to image multiplexer    sitepoint.com

Ok, so I have admit this is a bit out of the ordinary (read 'Nerdy') but I sometimes like to write quirky scripts just to see what I can do. In this case, I'm making a JavaScript binary (BCD) clock. I always wanted to make a binary clock with chips and LEDs (admittedly 'nerdy') but I figured I'd make it in ...