isRepeated.js

//This returns true if the number is repeated
function isRepeated(num) {
  
    let unique = [];   
    let numArr = num.toString()
    .split('');
 
   
   
 for (var i = 0; i < numArr.length; i++) {

   //if the number is not already in unique, push it to unique
   if (unique.indexOf(numArr[i]) === -1) {
     unique.push(numArr[i]);
   } else {
     return true;
   }
 }
}