JSFiddle - React, Tailwind, and code Playground

addLeadingZero

by Jennifer Perrin

JavaScript

function addLeadingZero(n, totalDigits)
    {
        if(!totalDigits)totalDigits > 1;
        n = String(n);
        while (n.length < totalDigits)
        n = "0"+n;
        return n;
    }
 
var num = 5;
num = addLeadingZero(num, 2);
alert (num);