Akuli · luisPinedo · Oct 21, 2018 · Oct 21, 2018 · Oct 21, 2018 · Oct 21, 2018
diff --git a/basics/lists-and-tuples.md b/basics/lists-and-tuples.md
@@ -100,7 +100,8 @@ Lists have a few [useful
 methods](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists).
 Some of the most commonly used ones are append, extend and remove.
 `append` adds an item to the end of a list, `extend` adds
-multiple items from another list and `remove` removes an item.
+multiple items from another list and `remove` removes an item. 
+It can also be added with the method of `insert`
 
 ```python
 >>> names
@@ -115,7 +116,9 @@ multiple items from another list and `remove` removes an item.
 >>> names.extend(['go|dfish', 'theelous3'])  # wb guys
 >>> names
 ['wub_wub', 'RubyPinch', 'Nitori', 'Akuli', 'go|dfish', 'theelous3']
->>>
+>>> names.insert(len(names), "Aly")
+>>> names
+['wub_wub', 'RubyPinch', 'Nitori', 'Akuli', 'go|dfish', 'theelous3', 'Aly']
 ```
 
 Note that `remove` removes only the first match it finds.
@@ -128,6 +131,26 @@ Note that `remove` removes only the first match it finds.
 >>>
 ```
 
+The method `pop` also works for delete elements of the list.
+
+```python
+>>> names = ['theelous3', 'go|dfish', 'theelous3']
+>>> names.pop(1)
+>>> names    # the second item was removed
+'go|dfish'
+>>> names
+['theelous3', 'theelous3']
+
+>>> names = ['theelous3', 'go|dfish', 'theelous3']
+>>> names.pop()
+theelous3'
+>>> names
+['theelous3', 'go|dfish']
+
+>>>
+```
+
+
 If we need to remove all matching items we can use a simple while loop.
 We'll talk more about loops [in the next chapter](loops.md).
 
@@ -230,6 +253,44 @@ like this:
 
 ![Different lists.](../images/differentlist.png)
 
+
+We can count the number of items that have a list.
+
+```python
+>>> a = [1, 2, 3, 4, 2, 5, 2]
+>>> a.count(2)
+3
+>>> a.count(5)
+1
+>>> a.count(9)
+0
+>>> a = ['theelous3', 'wub_wub', 'RubyPinch', 'go|dfish', 'Nitori']
+>>> a.count('wub_wub')
+1
+```
+
+
+We can sort the items that have a list
+
+```python
+>>> a = [1, 2, 3, 4, 2, 5, 2]
+>>> a.sort()
+>>> a
+[1, 2, 2, 2, 3, 4, 5]
+>>> a.sort(reverse = True)
+>>> a
+[5, 4, 3, 2, 2, 2, 1]
+>>> a = ['wub_wub', 'theelous3', 'RubyPinch', 'go|dfish', 'Nitori']
+>>> a.sort()
+>>> a
+['Nitori', 'RubyPinch', 'go|dfish', 'theelous3', 'wub_wub']
+>>> a.sort(reverse = True)
+['wub_wub', 'theelous3', 'go|dfish', 'RubyPinch', 'Nitori']
+>>>
+```
+
+
+
 ## Tuples
 
 Tuples are a lot like lists, but they're immutable so they
@@ -274,6 +335,41 @@ but some people like to do it this way.
 >>>
 ```
 
+
+You can have nested tuples.
+
+```python
+>>> n = 1, 2, 3
+>>> n
+(1, 2, 3)
+>>> n[0]
+1
+>>> l = 'a', 'b', 'c'
+>>> l
+('a', 'b', 'c')
+>>> l[0]
+'a'
+>>> t = n, l 
+>>> t
+((1, 2, 3), ('a', 'b', 'c')) #The tuples n and l are nested
+>>> t[0]
+(1, 2, 3)
+>>> t[1]
+('a', 'b', 'c')
+>>> t[1][2]
+'c'
+>>> v = ([1, 2, 3], [3, 2, 1,[7, 8, 9]])
+>>> v
+([1, 2, 3], [3, 2, 1, [7, 8, 9]])
+>>> v[1]
+[3, 2, 1, [7, 8, 9]]
+>>> v[1][3]
+[7, 8, 9]
+>>> v[1][3][0]
+7
+```
+
+
 Tuples don't have methods like append, extend and remove
 because they can't change themselves in-place.
 

diff --git a/basics/loops.md b/basics/loops.md
@@ -133,6 +133,29 @@ immediately.
 >>>
 ```
 
+While with a condition
+
+```python
+>>> cont = 10
+>>> while (cont >= 0):
+...     print(cont)
+...     cont -= 1
+...
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
+0
+>>>
+```
+
+
 ## Until loops
 
 Python doesn't have until loops. If we need an until loop, we can use
@@ -212,6 +235,7 @@ how about you
 >>>
 ```
 
+
 Without the comments, that's only two simple lines, and one variable.
 Much better than anything else we tried before.
 
@@ -232,6 +256,7 @@ Here the `in` keyword is just a part of the for loop and it has a
 different meaning than it would have if we had `thing in stuff` without
 a `for`. Trying to do `for (thing in stuff):` creates an error.
 
+
 Right now the while loop version might seem easier to understand for
 you, but later you'll realize that for loops are much easier to work
 with than while loops and index variables, especially in large projects.
@@ -260,9 +285,30 @@ c
 >>>
 ```
 
+You can print the multiplication tables.
+
+```python
+>>> table = 2
+>>> for i in range(1, 11):
+...     print(table,"x", i, "=",(table*i))
+...
+2 x 1 = 2
+2 x 2 = 4
+2 x 3 = 6
+2 x 4 = 8
+2 x 5 = 10
+2 x 6 = 12
+2 x 7 = 14
+2 x 8 = 16
+2 x 9 = 18
+2 x 10 = 20
+>>>
+```
+
 If we can for loop over something, then that something is **iterable**.
 Lists, tuples and strings are all iterable.
 
+
 There's only one big limitation with for looping over lists. We
 shouldn't modify the list in the for loop. If we do, the results can
 be surprising:

diff --git a/basics/variables.md b/basics/variables.md
@@ -118,11 +118,40 @@ can also use `+=`, `-=`, `*=` and `/=` instead of `+`, `-`, `*` and
 `/`. The "advanced" `%=`, `//=` and `**=` also work.
 
 ```python
+>>> a = 11
 >>> a += 2          # a = a + 2
+>>> a
+13
+
+>>> a = 11
 >>> a -= 2          # a = a - 2
+>>> a
+9
+
+a = 11
 >>> a *= 2          # a = a * 2
+>>> a
+22
+
+>>> a = 11
 >>> a /= 2          # a = a / 2
->>>
+>>> a
+5.5
+
+>>> a = 11
+>>> a %= 2          # a = a % 2
+>>> a
+1
+
+>>> a = 11
+>>> a //= 2         # a = a // 2
+>>> a
+5
+
+a = 11
+>>> a **= 2         # a = a ^ 2
+>>> a
+121
 ```
 
 This is not limited to integers.
@@ -136,6 +165,17 @@ This is not limited to integers.
 >>>
 ```
 
+But, you can only use `+=` and `*=`. Because of with the others operators
+it causes a type error.
+
+```python
+>>> a = 'hello'
+>>> a -= 3
+TypeError: unsupported operand type(s) for -: 'str' and 'str'
+>>>
+```
+
+
 Now we also understand why typing hello to the prompt didn't work in
 the beginning of this tutorial. But we can assign something to a
 variable called hello and then type hello: