30-seconds-of-code/snippets/toDecimalMark.md

toDecimalMark

Convert a float-point arithmetic to the Decimal mark form.

Use toString() to convert the float num to a string, then use regex to separate every three characters of the integer part with a comma. Use Ttemplate Literals to return joined parts.

const toDecimalMark = (num) => {
 let numberParts = num.toString().split('.')
 return `${numberParts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ',')}.${numberParts[1]}`
}
// toDecimalMark(12305030388.9087) //-> '12,305,030,388.9087'