Show a leading zero if a number is less than 10

Question

Possible Duplicate    JavaScript equivalent to printf string format   How can I create a Zerofilled value using JavaScript        I have a number in a variable   var number   5    I need that number to be output as 05   alert number      I want the alert to display 05  rather than 5    How can I do this    I could manually check the number and add a 0 to it as a string  but I was hoping there s a JS function that would do it

User · Accepted Answer

There s no built-in JavaScript function to do this  but you can write your own fairly easily   function pad n        return  n  lt  10      0    n    n        EDIT   Meanwhile there is a native JS function that does that  See String padStart   x000D   x000D  console log String 5  padStart 2   0     x000D   x000D   x000D

User · Answer

Try this  function pad  str  max      return str length  lt  max   pad  0    str  max    str     alert pad  5   2      Example  http   jsfiddle net   Or  var number   5  var i  if  number  lt  10        alert  0  number       Example  http   jsfiddle net

[javascript] Show a leading zero if a number is less than 10

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