Code for finding LCM or LCD

Note: LCD and LCM are same LCD: Least common divisor LCM: Least Common Multiple

Using LOOP

function lcm(a, b) {
  let min = a > b ? a : b;

  // while loop
  while (true) {
    if (min % a == 0 && min % b == 0) {
      return min;
    }
    min++;
  }
}

lcm(15, 20); // 60

Using GCD

function gcd(a, b) {
  if (b === 0) return a;
  return gcd(b, a % b);
}

function lcm(a, b) {
  return (a * b) / gcd(a, b);
}

lcm(15, 20); // 60