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### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today. # Can I get an example of how to solve the challenge question?

Make a function named add_list that takes a list. The function should then add all of the items in the list together and return the total. Assume the list contains only numbers. You'll probably want to use a for loop. You will not need to use input().

functions.py
```# add_list([1, 2, 3]) should return 6
# summarize([1, 2, 3]) should return "The sum of [1, 2, 3] is 6."
# Note: both functions will only take *one* argument each.
```

Here a for loop code i just made. Its pretty useless and there is a much 'efficient' way of doing it. Basically, the argument (num) is a list. The 'for loop' loops thought all the indexed item in the list and detects whether it holds the value '6'. It then returns True.

I think you can probably understand now how the exercise want you to design the code.

```def find_six(num):
'''([list of int]) -> bool
Returns True iff it finds number 6.
'''

# Loops thought all the item in the list
for each_num in num:
# Returns True iff the item is equal to 6
if (each_num == 6):
return True

else:
pass
``` Without knowing what you have tried so far, I will give you an answer in pseudo-code:

```# Define add_list function which takes one argument for a list
# Initialize variable for sum; set to 0
# Loop through each number in the list
# sum equals sum plus current number
# Return the sum
``` Here's my code, I hope it helps. I was definitely overthinking it. My biggest problem was converting the list to string, but remembering to use .format() helped.

```def add_list(nums):
for items in nums:
items += items
return items

def summarize(nums):
return "The sum of {} is {}.".format(nums, add_list(nums))
```