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<h2 id="head-of-Documentation">Python Documentation</h2>
<ul id="header-ul">
<li><a class="nav-link" href="#Introduction_to_python">Introduction to python</a></li>
<li><a class="nav-link" href="#What_can_Python_do?">What can Python do?</a></li>
<li><a class="nav-link" href="#Hello_world">Hello world</a></li>
<li><a class="nav-link" href="#Variables">Variable</a></li>
<li><a class="nav-link" href="#Data_type">Data types</a></li>
<li><a class="nav-link" href="#Python_If_..._Else">Python If ... Else</a></li>
<li><a class="nav-link" href="#Loops">Loops</a></li>
<li><a class="nav-link" href="#While_Loops">While loops</a></li>
<li><a class="nav-link" href="#For_Loops">For loops</a></li>
<li><a class="nav-link" href="#Python_Functions">Python Functions</a></li>
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<section id="Introduction_to_python" class="main-section">
<header>Introduction to python</header>
<article>
<p id="para_of_Introduction" >Python has a simple syntax similar to the English language. Python has syntax that allows developers to write programs with fewer lines than some other programming languages. Python runs on an interpreter system, meaning that code can be executed as soon as it is written.This means that prototyping can be very quick
<p>It is used for:</p>
<ul id="list-of-uses">
<li>web development (server-side)</li>
<li>software development,</li>
<li>mathematics,</li>
<li>system scripting</li>
</ul>
</p>
</article>
</section>
<section id="What_can_Python_do?" class="main-section">
<header>What can Python do?</header>
<article>
<ul id="info-python-can-do">
<li>Python can be used on a server to create web applications.</li>
<li>Python can be used alongside software to create workflows.</li>
<li>Python can connect to database systems. It can also read and modify files.</li>
<li>Python can be used to handle big data and perform complex mathematics.</li>
<li>Python can be used for rapid prototyping, or for production-ready software development.</li>
</ul>
</article>
</section>
<section id="Hello_world"class="main-section">
<header>Hello world</header>
<article>
<p id="body-hello-world">To get started with writing Python, open the terminal and write your first "Hello world" Python code:</p>
<code id="code-hello-world">print("Hello, World!")</code>
<p id="2body-hello-world" class="code">Hit Ctrl+R to run the Fist ever programe of Python </p>
</section>
<section id="Variables" class="main-section">
<header>Variables</header>
<ul id="body-of-variables">
<li>Python has no command for declaring a variable.</li>
<li>A variable is created the moment you first assign a value to it.</li>
<li>Variables do not need to be declared with any particular type, and can even change type after they have been set.</li>
<li>You can also type cast the variable with type() function</li>
</ul>
</article>
</section>
<section id="Data_type" class="main-section">
<header>Data type</header>
<article>
<p id="body_of_datatype">In programming, data type is an important concept.
Variables can store data of different types, and different types can do different things.
Python has the following data types built-in by default, in these categories:</p>
<ul id="list_of_datatype">
<li>Text Type: str</li>
<li>Numeric Types: int, float, complex</li>
<li>Sequence Types: list, tuple, range</li>
<li>Mapping Type: dict</li>
<li>Set Types: set, frozenset</li>
<li>Boolean Type: bool</li>
<li>Binary Types: bytes, bytearray, memoryview</li>
<li>None Type: NoneType</li>
<ul>
<p id="2body_of_datatype">Although these data types are a relatively small amount, they enable you to perform useful functions with your applications. Objects and functions are the other fundamental elements in the language. You can think of objects as named containers for values, and functions as procedures that your application can perform.</p>
</article>
</section>
<section id="Python_If_..._Else"class="main-section">
<header>Python If ... Else</header>
<article>
<p id="body_of_ifelse">Use the if statement to execute a statement if a logical condition is true. Use the optional else clause to execute a statement if the condition is false. An if statement looks as follows:</p>
<code class="code">
a = 33<br>
b = 200<br>
if b > a:<pre> print("b is greater than a")</pre>
</code>
<h4 id="head_of_ifelse">Indentation</h4>
<p id="2body_of_ifelse">Python relies on indentation (whitespace at the beginning of a line) to define scope in the code. Other programming languages often use curly-brackets for this purpose.</p>
<code class="code">
a = 33<br>
b = 200<br>
if b > a:<br>
print("b is greater than a") # you will get an error
</code>
<h4 id="2head_of_ifelse">Elif</h4>
<p id="2body_of_ifelse">The elif keyword is pythons way of saying "if the previous conditions were not true, then try this condition".</p>
<code class="code">
a = 33<br>
b = 33<br>
if b > a:<br>
<pre> print("b is greater than a")</pre>
elif a == b:<br>
<pre> print("a and b are equal")</pre>
</code>
<h4 id="2head_of_ifelse" >Else</h4>
<p id="3body_of_ifelse">The else keyword catches anything which isn't caught by the preceding conditions.</p>
<code class="code">
a = 200<br>
b = 33<br>
if b > a:<br>
<pre> print("b is greater than a")</pre>
elif a == b:<br>
<pre> print("a and b are equal")</pre>
else:<br>
<pre> print("a is greater than b")</pre>
</code>
</article>
</section>
<section id="Loops" class="main-section">
<header>Loops</header>
<article>
<p id="body_of_loops">Python has two primitive loop commands:</p>
<ul>
<li>While loops</li>
<li>For loops</li>
</ul>
</article>
</section>
<section id="While_Loops" class="main-section">
<header>While Loops</header>
<article>
<p>With the while loop we can execute a set of statements as long as a condition is true</p>
<code>i = 1<br>
while i < 6:<br>
print(i)<br>
i += 1<br></code>
<p>The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i, which we set to 1.
</p>
<h4>Break Statement</h4>
<p>With the break statement we can stop the loop even if the while condition is true:</p>
<code>i = 1<br>
while i < 6:<br>
print(i)<br>
if i == 3:<br>
break<br>
i += 1<br>
</code>
</article>
</section>
<section id="For_Loops" class="main-section">
<header>For Loops</header>
<article>
<p>A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string).
This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages.
With the for loop we can execute a set of statements, once for each item in a list, tuple, set etc.</p>
<code>fruits = ["apple", "banana", "cherry"]<br>
for x in fruits:<br>
print(x)<br>
</code>
<h4>The range() Function</h4>
<p>To loop through a set of code a specified number of times, we can use the range() function,
The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and ends at a specified number.</p>
<code>for x in range(6):<br>
print(x)<br></code>
</article>
</section>
<section id="Python_Functions" class="main-section">
<header>Python Functions</header>
<p>A function is a block of code which only runs when it is called.
You can pass data, known as parameters, into a function.
A function can return data as a result.</p>
<h4>Creating a Function</h4>
<p>In Python a function is defined using the def keyword:</p>
<code>
def my_function():<br>
print("Hello from a function")<br>
</code>
<h4>Calling a Function</h4>
<p>To call a function, use the function name followed by parenthesis:</p>
<code>
def my_function():<br>
<pre> print("Hello from a function")</pre>
my_function()<br>
</code>
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