Show:
What is a phyton
phyton intro
phyton syntax
comments
Python Variables
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phyton have a syntax? 

YES

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Why Python?

  • Python works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc).
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Execute Python Syntax

As we learned in the previous page, Python syntax can be executed by writing directly in the Command Line:

>>> print("Hello, World!")
Hello, World!

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Python Comments

Comments can be used to explain Python code.

Comments can be used to make the code more readable.

Comments can be used to prevent execution when testing code.

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Variables


Variables are containers for storing data values.

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Python is a computer programming language often used to build websites and software, automate tasks, and conduct data analysis. 





yes

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Python Syntax compared to other programming languages

  • Python was designed for readability, and has some similarities to the English language with influence from mathematics.
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Python Indentation


Indentation refers to the spaces at the beginning of a code line.

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Creating a Comment

Comments starts with a #, and Python will ignore them:

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Creating Variables

Python has no command for declaring a variable.

A variable is created the moment you first assign a value to it.

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By who is created phyton

 Guido van Rossum

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It is used for:

  • web development (server-side),
  • software development,
  • mathematics,
  • system scripting.
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Comments

Python has commenting capability for the purpose of in-code documentation.

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Multi Line Comments

Python does not really have a syntax for multi line comments.

To add a multiline comment you could insert a # for each line:

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Casting

If you want to specify the data type of a variable, this can be done with casting.

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released in

1991

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What can Python do?

  • Python can be used on a server to create web applications.
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Example

#This is a comment.
print("Hello, World!")

Try it Yourself »


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A comment does not have to be text that explains the code, it can also be used to prevent Python from executing code:

Example

#print("Hello, World!")
print("Cheers, Mate!")

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Get the Type


You can get the data type of a variable with the type() function.


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What can Python do?

  • Python can be used on a server to create web applications.
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Good to know

  • The most recent major version of Python is Python 3, which we shall be using in this tutorial. However, Python 2, although not being updated with anything other than security updates, is still quite popular.
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Example

Syntax Error:

if 5 > 2:
 print("Five is greater than two!")
        print("Five is greater than two!")

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Or, not quite as intended, you can use a multiline string.

Since Python will ignore string literals that are not assigned to a variable, you can add a multiline string (triple quotes) in your code, and place your comment inside it:

This is a comment
written in
more than just one line
"""
print("Hello, World!")

Try it Yourself »


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Single or Double Quotes?

String variables can be declared either by using single or double quotes: