Check if an array is descending, ascending or not sorted?

Question

I\'m just beginning with programming using javascript and I need to practice some questions to get EXP with the logic of code build. I got this question for homework but I c

Answer 1

"Check if an array is descending, ascending or not sorted using loops"

// define the array
var array = [1,2,3,7];

// keep track of things
var isDescending = true;
var isAscending = true;

// we're looking ahead; loop from the first element to one before the last element
for (var i=0, l=array.length-1; i %s) = %s", array[i], array[i+1], (array[i] > array[i+1]));

   // have all values been descending so far?
   console.log("B: isDescending: %s", isDescending);

   // if this value is greater than the next and all values have been descending so far, isDescending remains true. Otherwise, it's set to false.
  console.log("are A and B both true? %s", (isDescending && (array[i] > array[i+1])));

   // add a line break for clarity
   console.log("");

   ////////////////////////////////////////////////////////////


   // true if this is greater than the next and all other so far have been true
   isDescending = isDescending && (array[i] > array[i+1]);

   // true if this is less than the next and all others so far have been true
   isAscending = isAscending && (array[i] < array[i+1]);

}

if (isAscending)
{
  console.log('Ascending');
}
else if (isDescending) 
{
  console.log('Descending');
}
else
{
  console.log('Not Sorted');
}