Make a function named add_list that adds all of the items in a passed-in list . I am completely befuddled. Please help.

Okay. It is a bit hard challenge. But possible to solve. First python function. You can define Python function

def add_list():

Next passing in list. Meaning you are passing in a list to the defined Python function.

If you want to pass-in variable or list, you will have to do in the braces next to function name. Something like this.

def add_list(variable):

Passing in list to Python function looks like this: I assume list_num is a list

def add_list(list_num):

To add all items in a list, you can use sum() function. In Python, if list items are integers or float you can use sum() function to add all of them together.

So final version of this program looks like this:

def add_list(list_num):
      return sum(list_num)

I hope it helps.

I really thank you all for your help. I realized from your posts that I forgot about using return. Again, thank you!

Here's the looped version.

def add_list(items_list):
  total = 0
  for item in items_list:
    total = total + item
  return total

def summarize(items_list):
  list = str(items_list)
  total = 0
  for item in items_list:
    total = total + item
  return "The sum of {} is {}.".format(list,total)