Tag Archives: #Mastery24

Hey! This is one of the last masteries tutorials for the course. This time, I explained Arrays. I haven’t practiced much with this topic, so I consulted this page for more info (http://www.cplusplus.com/doc/tutorial/arrays/). Besides, I looked at Eduardo Tostado’s mastery tutorial (thanks a lot!).  So, here’s the link to the PDF:

https://drive.google.com/open?id=0B7w3BFfqL9oQakstc25EajJ2MW8&authuser=0

#TC1017 #mastery24

#TC1014 #Mastery24

in this mastery I will write about function range. first what does it do? it generates a list of numbers, which is generally used to iterate over with for loops.

function has two sets of parameters, as follows:

range(stop)

wich it will print numbers beginig from zero to (stop-1). For example:

range(4) == [0,1,2,3]

the other parameters is:

range(start,stop,step)

>start it means in wich number it will start

>stop it means  when is going to stop but like this(stop-1)

>step it means the difference between each number in the sequence

examples of using range:

1.-range(0,11,2) == [0,2,4,6,8,10]

2.-range(3,9)==[3,4,5,6,7,8]

this is a link that its very helpful to understand : http://www.pythoncentral.io/pythons-range-function-explained/

#TC1014 #Mastery24

In this mastery I will talk about tuples.A tuple is a sequence of immutable Python objects, is like lists, but they have on especially diference, that ones yu create a tuple you can not modify but in lits you can. Also the sintax of tuples are parentheses and lists use square brackets.for example:

tuple1=(“efrain”,”duarte”,”lopez”,20)

you can write strings,numbers is just like lists.

be careful when you just write one thing inside a tuple you have to write it like this:

tuple2=(“ice”,) ——> such is just one thing you have to add a comma to the end

To acces values in tuples  you have to use square brackets.for example:

tuple1=(“efrain”,”duarte”,”lopez”,20)

print tuple[0]——–>the result will be “efrain”

print tuple[0:2]—–>the result will be [“efrain”,”duarte”,”lopez”]

this is counting beging form 0.

You cant modify a tuple but you can create a new tuple with other tuples like this:

tuple3=tuple1+tuple2

tuple3 will be>>>(efrain”,”duarte”,”lopez”,20,”ice”)

Also the tuples respond to the + and * operators much like strings, and this operations will create a new tuple not just strings .For example the basic tuples operations:

tuple4=(1,2,3,4)

print  lent(tuple4)——>resutl= 4

also we can use Concatenation,Repetition,Iteration.

an important point is that we can modify a list inside a tuple, but the tuple we can n ever touch it.

for more information here is a link its very helpful:

http://www.tutorialspoint.com/python/python_tuples.htm

In this post I will explain you what tuples are and how to use them.

If we remember from an old post, we saw that we could group items by using lists. Tuples are just like lists, but the main difference is that once you had created a Tuple, you can not modify it, as we could with lists.

The syntax of a Tuple, different from lists where we used brackets, is the following:

     Tuple=(item1,item2,item3,itemN)

Where item1, item2, item3 and itemN can take any value, it doesn’t matter if it is a string, integer number, or even a list or another tuple, etc.

We can refer to values of a tuple as we refer to values of a list. The syntax is the following:

>>Tuple[2]

item3

Where 2 referes to the third item because it starts counting from 0.

We may not be able to modify Tuples but we can always modify a list inside the tuple, as soon as we dont wanted to put up any other value instead of the list itself.

#TC1014 #mastery24