Javascript How to convert number to decimal or add zero

In this blog, we will discuss several ways to add pad two zeroes to the given number or a string.

For example, if We have a number=12, we have to output the number to 12.00 by adding two zeroes to the number.

In javascript, numeric values represent in Number type. The number can be 12,-12,12.00. There is no difference between integers (12,-12)and floating numbers (12.00).

The number can also be stored in the form of strings(“12”)
Convert to a decimal using with toFixed(2) method. Number.toFixed() method used to format the given number, outputs floating-point number. here is syntax


This takes decimal places to count as input for a given number only, which returns the digits count after the decimal point(.)

In the below example, The given number is converted to a decimal number with 2 digits if the input is a string, it throws TypeError:strValue.toFixed is not a function, convert the string to a number using parseInt and use the toFixed method

let value = 12;
console.log(typeof value); //number

console.log(value.toFixed(2)); //12.00

let strValue = "34";
console.log(typeof strValue); //string
console.log(strValue.toFixed(2)); //TypeError:strValue.toFixed is not a function

let num = Number.parseInt(strValue);

Convert to decimal using toLocaleString() method

toLocaleString() method in Number gives a localized version of a given number.

toLocaleString(Locales, optionalConfigurations);

locale is en or ES,
Optional configurations are minimumFractionDigits =2, which tells many digits after a decimal point. It accepts the English language.

var value = 17;
var decimalNumber = value.toLocaleString("en", {
  useGrouping: false,
  minimumFractionDigits: 2,

You can check my other post on Javascript check substring exists in a String