Please help don't understand why my code isn't working

Hey There! Excellent catches for sure on the semi colon.

I have a feeling there may be some larger issues at play here. If this is exactly how you have the script constructed, I would like to offer a few suggestions.

As far as I can tell, at no point does your function ever get called to invoke the loop to begin the calculation. You can address this by changing your console.log() statement. At the end of the statement, there is a reference to the variable totalFriends, which might be returning zero. You can swap that variable for a function call.

console.log("total number of friends coming to the party is: " + yourFunctionCallHere(arrayOfFriendsHere));

I will address another way to handle calling your function at the end!

I would also caution you to change the name of your function, or the variable. From what I understand, some browsers don't respond well to this.

You may find that your loop still isn't preforming as expected.

Inside your loop when you address the totalFriends variable, it's not quite the one were looking for, this is a scope issue. You will either want to pass in the variable totalFriends as a parameter to your function, or you can create a local variable inside your function, preform and store your calculation within the local variable, and then return your local variable to your totalFriends global variable.

I copied your code and made appropriate changes to test these ideas and came up with 15 guests, heck of a party if id say!

const friendCountArray = [0,1,2,3,4,5]; var totalFriends = 0;

    function getTotalFriendsCount(friendCountArray){
      let totalFriends = 0;
      for(var i = 0; i < friendCountArray.length; i++){


        totalFriends += friendCountArray[i];
        console.log(i + "and : " + totalFriends);
      }
      return totalFriends
    };

    console.log("the totalFriends coming to the party is...  " + getTotalFriendsCount(friendCountArray));

or

const friendCountArray = [0,1,2,3,4,5]; var totalFriends = 0;

function getTotalFriendsCount(friendCountArray){ let totalFriends = 0; for(var i = 0; i < friendCountArray.length; i++){ totalFriends += friendCountArray[i]; } return totalFriends };

totalFriends = getTotalFriendsCount(friendCountArray);

console.log("the totalFriends coming to the party is... " + totalFriends);

I hope this helps!