Question

How to convert a number to binary value in JavaScript

Answer 1

var num = 15;
var binary = num.toString(2);

document.write(binary + "<br />");

/*
run:

1111

*/

 

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Answer 2

var n1 = 9;
var n2 = -9;

document.write(n1 + " = " + n1.toString(2) + "<br />");
document.write(n2 + " = " + (n2 >>> 0).toString(2) + "<br />");

/*
run:

9 = 1001
-9 = 11111111111111111111111111110111

*/

 

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