--Originally published at Ed_Alita

The backgroud

This two funtions are used to create loop that inside is a code that you wish to repeat it self. The question is if they are the same how to choose between them. I will explain each one and then teach you how to choose between them.

For

This funtion repeats itself only the times that you indicate or until it condition is not longer true.

Lets see this example:

This code for each letter in the word Python will run the code.

Let’s see what it does.

While

This funtion repeats itself until it make false it’s value.

This is the logic that While follows:

The next Example will make it clear:

This program will run each time until count be 9. Lets see what it does:

Which one I use?

The use of each one depends on what you need. Lets see if you know how many times the user will put the correct answer use for but if you don’t know how many times you can use a infinite while.

The material use can be seen here:

https://docs.python.org/3/reference/compound_stmts.html#while

--Originally published at Ed_Alita

Did you mean this?

No!!!

Nesting is puting a lot of conditional in order to make a more complex decison. For example the joysticks of a Xbox 360 have this kind of thinking.

--Originally published at Ed_Alita

The core of a program is if and else because thaey give the flow to a program therefore in order to make a program you net to know how do if and else work.

To put in python this is the rules to put it:

It has three parts the comparator and then the action this is a if context.

To do a else if comparation is the next one.

The last part is the else if the compartor does not apply it goes directly to the else.

If the condition is true:

if the cpondition is false:

Now you are a step futher in becoming a code master.

Elif

This operator is use to compare a variable to a lot of expressin if any of them is true you go to a default expression.

Put the next cod eto invoque the elif:

the result is the next one:

The material seen here is in:

https://www.tutorialspoint.com/python/python_if_else.htm

--Originally published at Ed_Alita

Creating a Module

This is the 2nd part of my last post. In a new document of phyton we are goig to create a module or librarie. Therefore the first thing to do is to define a funtion and what does the funtion have to do.

The next exmaple is on how to get the fibonnacci serie.

This is a very simple example:

In this second case is the same only it put the result in a list:

Then we save it as Fibo.py

Using it

Now we go to cywin or your compiler.

1. We got to the location of our programs.
2. Next we put python3 and presss enter.
3. Then we import the Fibo archive.
4. Then we put Fibo.fib(10) With this we are calling a funtion that is inside of  Fibo.

The information mentionted in this archive is in the next link

https://docs.python.org/2/tutorial/modules.html

--Originally published at Ed_Alita

In Python there are all lot of functions that are not in it. In this cases they are called libraries which can be imported. There is a list on  which libraries are default in python3 here. Let’s how they work:

This how to import a libraries:

This code is how to run a simple random:

The Result of the code is the next one:

The resources of this information is the next one:

http://www.pythonforbeginners.com/random/how-to-use-the-random-module-in-python

https://docs.python.org/2/library/

--Originally published at Ed_Alita

The elemental thing to understand this topic is to define what a function is. It can be define as a block organized, reusable code that is used to perform a single, related action. The language of python by default is gave you a lot of functions but you can make your own functions.  Let’s see how we can do it:

1 Step

Define a function

In python you can define function to be use in you code. The  rules to make these are the followings:

• The functions begin with def followed by the function name and parentheses ().
• Any input parameters or arguments should be placed within these parentheses.
• The first statement of a function can be an optional statement.
• The code block within every function starts with colon (:) and is indented.
• The statement return exits a function, optionally  passing back an expression to the caller. A return statement with no argument is the same as return none

Syntax

def function-name( parameters ):
   "function_doc string"
   function_suite
   return [expression

Example

The following function take the parameter string and then print it

2 Step

Calling a Function

Defining a function only gave it’s name an the parameters of it. So how the hell I use this thing that I create.

To call a function is simple you only put the name and the parameters let’s see with printme().

The result of calling by this way is the next one.

Function with multiple arguments

This example is only to show you that you can have more than one argument inside a function.

This function requires two arguments therefore is more complex. The age can be initialized by any value in this case I use 35 only for the lols.

The result of calling it and running it is the