Question

How to left pad a number with zeros in Node.js

Answer 1

let n = 34891;
 
// padStart(targetLength, padString)
 
console.log(String(n).padStart(8, '0'));
 
 
 
/*
run:
 
00034891
 
*/

 

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Answer 2

function LeftPadWithChar(n, len, padch = '0') {
    n = n + '';
      
    return n.length >= len ? n : new Array(len - n.length + 1).join(padch) + n;
}
  
let num = 34891;
  
console.log(LeftPadWithChar(num , 8));
  
  
  
/*
run:
  
00034891
  
*/

 

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