def average(numbers):

total = 0

def sum(numbers = []):

total += numbers

total = float(total)

total = total / len(numbers)

return float(total)

# 5/9 Below is my code. it show an error

**beeraider**#1

**ryebread4**#2

for the return function it has to be a var not a 'float()' function

also you can put all that inside of 1 line

```
def average(numbers):
total = float(sum(numbers))/len(numbers)
return total
```

**ana_catarina**#3

Hi is it possible to have an explanation to the exercise, as i did not understand how you go to that end result?

Hi @beeraider ,

Because your code is not formatted, it is difficult for other users to read and debug it. As code is being posted, you can format it by selecting it, and then by clicking the `</>`

button above the editing area. This will enable us to see important details, such as the indentation and underscores.

You have two function headers in your code, namely, this one ...

`def average(numbers):`

... and this one ...

`def sum(numbers = []):`

But without being able to see your indentation, we cannot discern whether the `sum`

function is global or whether it is defined within the `average`

function.

Hi, @ana_catarina,

@ryebread4's solution works by using the `sum`

built in function to provide the total of all the items in the `numbers`

list. To guarantee that this total is of `float`

type, so that when we perform a division, we retain any fractional part that results, the call to `sum`

is enclosed as an argument to a call to the `float`

built in function. Then, that result is divided by the result of calling the `len`

built in function on the `numbers`

list.

To summarize, that solution divides the total of all the items in `numbers`

by the number of items in `numbers`

and `return`

s the result.

**ajaxace32891**#8

I didn't understand your question, but the outcome of the exercise would be as follows:

```
def average(numbers):
total = sum(numbers)
return float(total) / len(numbers)
```

Careful with indentations!