Pad a number with leading zeros - Javascript Number Operation

Javascript examples for Number Operation:Number Format

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Description

Pad a number with leading zeros

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript">
    window.onload=( function() {//from  w w w . j  a  v  a  2  s  .c  o  m
function pad(input) {
    var BASE = "0000";
    return input ? BASE .substr(0, 4 - Math.ceil(input / 10)) + input : BASE;
}
console.log(pad(0));
console.log(pad(9999));
    });

      </script> 
   </head> 
   <body>  
   </body>
</html>

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