text: //Write code to add all the numbers in 'arr' and return the total
  const array = [1,2,3];
  
  let sum = 0;
  
  
  const sumArray = function(arr){
      for (i=0; i<arr.length; i++){
          var currentNum = arr[i];
          //console each number's index POSITION in the array
          sum += currentNum;
          // return total;
      }
      console.log(sum);    
  }
  sumArray(array);
  
  //NOTE: += is simply shorthand for adding two variables to each other and 
  //then storing the result
  