## ~ Lists: Removing from

### Removing from a list

Removing things from a list is similar to adding them; we use different tools, but we still often need to talk in terms of positions, and those positions still start at 0.

## Removing an item by its position

If we know the position of the item we want to remove, we've got two options: the `del` command and the `pop(..)` command

### Removing an item with the `del` command

The `del` command works to remove items from a list. (`del` is short for "delete.")

The code below will remove the element in position 0 from list `l` – in this case, the 1:

``````l = [1,2,3,4,5]
del l[0]
# l is now equal to [2,3,4,5]
``````

We can also use `del` on a few elements at once, using the list-slicing commands we've learned:

``````l = [2,3,4,5]
del l[0:2]
# l is now equal to [4,5]
``````

### Removing an item with the `pop(..)` command

The `pop(..)` command "pops off" the element in the position of the number in the parentheses.

The code below will remove the element in position 3 from list `n` – in this case, the 'c':

``````n = ['a', 'b', 'c', 'd', 'e']
n.pop(3)
# n is now ['a', 'b', 'c', 'e']
``````

## Removing an element by its value

The `remove(..)` command removes whatever is in parentheses from the list.

``````m = [5,6,7,8,9]
m.remove(6)
# m is now [5, 7, 8, 9]
``````

If that element shows up more than once, it only removes the first occurence of that element from the list.

``````m = [5,5,6,7,8,9]
m.remove(5)
# m is now [5, 6, 7, 8, 9]
``````

If we try to remove something that isn't in the list, Python gives back a `ValueError`, which is its way of saying "Hey! I couldn't find the value you wanted, and now I don't know what to do!"

``````m = [5,7,8,9]
m.remove(0)
``````

## Challenge

Below, there's a console with a list called `li` that holds the numbers between 1 and 6. Use a combination of the techniques above to turn `li` into a list that holds only the evennumbers between 1 and 6.

``````# To start, li = [1, 2, 3, 4, 5, 6]
# After your code, li should be [2, 4, 6]
``````