Reverse a number mathematically

reverse.js

// reversing a number
let givenNum = 4552;
let numInRev = 0;

while (givenNum > 0) {
  const lastDigit = Math.floor(givenNum % 10);
  numInRev = numInRev * 10 + lastDigit;
  givenNum = Math.floor(givenNum / 10);
}

console.log(numInRev);