Code Golf
array-manipulation add tag
Adám
# Goal
Given a non-empty list `L` of numbers, compute the arithmetic mean average, that is 
$$
\frac1N\sum_{i=1}^{N}L_i
$$

The goal of this competition is to achieve the shortest code.

## Special rules
- Expressions/snippets that assume the variable `L` to exist are allowed for the purposes of this challenge.

## Example cases
Here are a few test cases that cover both simple cases and any edge cases:

| Input                 | Output                 | Notes  |
|-----------------------|------------------------|--------|
| `[3,1,4,1,5]` | `2.8` |        |
| `[3,3,3,3]`         | `3`          | All same |
| `[7]`                  | `7`                   | Single  |
Top Answer
EsolangingFruit
# [CJam], 7 bytes

    L1bL,d/

[Try it online!][TIO-kauougkt]

[CJam]: https://sourceforge.net/p/cjam
[TIO-kauougkt]: https://tio.run/##S85KzP1f6KdfXWflY/3fxzDJRydF/3@tasL/aGMFQwUTIDaN5QKywRDIMo8FAA "CJam – Try It Online"
Answer #2
Anonymous 1385
# [Jelly], 2 bytes
Jelly has a built-in.

    Æm

[Try it online!][TIO-kc3glnzp]

[Jelly]: https://github.com/DennisMitchell/jelly
[TIO-kc3glnzp]: https://tio.run/##y0rNyan8//9wW@7///@jjXUMdUyA2DQWAA "Jelly – Try It Online"

# [Jelly], 3 bytes

    S÷L

[Try it online!][TIO-kc3gkalg]

[Jelly]: https://github.com/DennisMitchell/jelly
[TIO-kc3gkalg]: https://tio.run/##y0rNyan8/z/48Haf////RxvrGOqYALFpLAA "Jelly – Try It Online"
Answer #3 Python 3
Rahul Verma
# Python 2, ~~24~~ 19* bytes
    print sum(l)/len(l)
[Try it online!](https://tio.run/##K6gsycjPM/qfYxttqGOkYxz7v6AoM69Eobg0VyNHUz8nNQ9I/f8PAA) 

\* 5 bytes reduced by Adam

Enter question or answer id or url (and optionally further answer ids/urls from the same question) from

Separate each id/url with a space. No need to list your own answers; they will be imported automatically.