Convert a string into a number keeping the commas in js

Question

is there any way to convert a string like "7,1" into a number and keep the commas after the conversion?. I've tried parseInt but that will ignore everything after the first value. Is there another way around it?

Answer 1

You can't keep commas when you convert them to numbers, however you can use .join() method on JS Arrays. Here is how you can do it.

var str = '7,1'

// Convert to numbers
// This will return [7, 1]
var nums = str.split(',').map((num) => Number(num))

// Reverse to previous values, but it will be converted to String type
var revertedStr = nums.join(',')

Answer 2

var str = '7,1';

// Split the above string variable into array
var numList = str.split(',');

// Type cast all these string values into number value
// Now we have an array of with each element in number format 
numList = str.split(',').map((num) => Number(num));
console.log(numList);

// Now as per your requirement if you jion them with comma then it will again become string.
console.log(typeof (numList.join(',')));

// So technically it's not possible to have comma as a value in number variable.
// If you can tell a bit about your use case then we might be able to help you with some alternative.```