gcs

function greatestCD() {

   let inputA=+document.getElementById("num1").value;
   let inputB=+document.getElementById("num2").value;
   let resultDiv=document.getElementById("result");

      a = Math.abs(inputA);
      b = Math.abs(inputB);
      let divisor=GetDivisor(a,b);

      resultDiv.textContent=divisor;

      function GetDivisor(a,b){

      if (b > a) {var temp = a; a = b; b = temp;}
      while (true) {
          if (b == 0) return  a;
          a %= b;
          if (a == 0) return b;
          b %= a;

      }
   }
}