how to invert a number javascript code example

Example 1: reverse int js

function reverseInt(n) {
  const reversed = n.toString().split("").reverse().join(""); 

  return parseInt(reversed) * Math.sign(n);
}

Example 2: reverse number in js

function reversedNum(num) {
  return (
    parseFloat(
      num
        .toString()
        .split('')
        .reverse()
        .join('')
    ) * Math.sign(num)
  )                 
}