Question

83

Padding zero to the left of number in Javascript

rated 0 times [ 84] [ 1] / answers: 1 / hits: 18625 / 10 Years ago, fri, august 8, 2014, 12:00:00

I have a ten digit number that will always be constant. I want to pad it so, that it will always remove a zero for every extra number added to the number. Can someone please show me an example of how I can do this?

eg. 0000000001

0000000123 

0000011299

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terrellhunterm

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answered 10 Years ago rhettforrestm · Accepted Answer

You can use this function:

function pad (str, max) {

  str = str.toString();

  return str.length < max ? pad(0 + str, max) : str;

}

Output

pad(123, 10);    // => 0000000123

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