Python3

Hello everyone, My name is Ganeshemanth. In this Blog I will teach about Python 3 programming language for free of cost. We can learn programming for free. My moto is to share my programming knowledge for free of cost through online Blog. Please refer below for free programming tutorial at free of cost. I will upload pdf soon.


Python is a High level, General purpose, Multi paradigm and Object oriented programming language. Python is invented by Guido Van Rossum. Python was first released in 1990.

                                                               -:Comments:- 

Comments can be used to explain python code, make the code more readable and prevent execution when testing code.

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

Example:- 

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

Comments can be placed at the end of a line, and Python will ignore the rest of the line:

Example:-

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

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("Ganeshemanth")
print("Cheers, Mate!")

Multiline Comments

Python does not really have a syntax for multiline comments.

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

Example:-

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

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:

Example:-

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

The string is not assigned to a variable, Python will read the code, but then ignore it, and you have made a multiline comment.

                                    -:Variables:-

Variables are containers for storing data values. Python has no command for declaring a variable. A variable is created the moment you first assign a value to it.

Example:-

x = 5

y = "John"

print(x)

print(y)

Variables do not need to be declared with any particular type, and can even change type after they have been set.

Example:-

x = 4       # x is of type int
x = "Ganeshemanth" # x is now of type str
print(x)

                                    -:Casting:- 

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

Example:-

x = str(3)    # x will be '3'
y = int(3)    # y will be 3
z = float(3)  # z will be 3.0


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

Example:-

x = 5
y = "John"
print(type(x))
print(type(y))

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

Example:-

x = "John"
# is the same as
x = 'John'

                            -:Case-Sensitive:-
Variable names are case-sensitive.

Example:-

This will create two variables:

a = 4
A = "Sally"
#A will not overwrite a

















































































































Comments

Post a Comment

Popular posts from this blog

Bitcoin mining

 Mining Bitcoin requires specialized hardware called ASIC miners (Application-Specific Integrated Circuit). Here's a general outline of how to mine Bitcoin with a miner: Get a Bitcoin Wallet : Before you start mining, you'll need a place to store your mined bitcoins. Choose a reliable Bitcoin wallet that suits your needs. Select Mining Hardware : ASIC miners are the most efficient hardware for Bitcoin mining. Research and purchase ASIC miners from reputable manufacturers. Consider factors like hash rate, power consumption, and price when choosing your hardware. Join a Mining Pool : Mining Bitcoin solo can be very challenging due to the high difficulty level. Joining a mining pool allows you to combine your computing power with other miners to increase your chances of successfully mining a block and receiving a reward. Popular mining pools include Antpool, F2Pool, and Slush Pool. Download Mining Software : Depending on your ASIC miner, you'll need to download and install the...
Read more

Unveiling the Art of Intraday Trading: Navigating the High-Stakes World of Day Trading

             Unveiling the Art of Intraday Trading: Navigating the High-Stakes World of Day Trading Intraday trading, also known as day trading, is a dynamic and fast-paced form of trading where positions are opened and closed within the same trading day. It's a high-stakes game that requires quick decision-making, astute market analysis, and nerves of steel. While intraday trading offers the potential for significant profits, it also carries inherent risks that can lead to substantial losses if not approached with caution and expertise. At the heart of intraday trading lies the quest to capitalize on short-term price movements in the financial markets. Traders seek to exploit fluctuations in stock prices, currencies, commodities, or other financial instruments to generate profits within the span of a single trading session. This requires a keen understanding of market dynamics, technical analysis techniques, and risk management strategies. One of...
Read more

How to act inspite of your emotions

                                          Navigating Emotions: The Art of Acting In Spite of Feeling Emotions are a fundamental aspect of the human experience, shaping our perceptions, influencing our decisions, and coloring our interactions with the world. Yet, there are times when our emotions can become overwhelming, threatening to derail our plans and cloud our judgment. In these moments, learning how to act in spite of our emotions can be a powerful skill, enabling us to navigate life's challenges with resilience and grace. The first step in acting in spite of our emotions is to cultivate self-awareness. By tuning into our thoughts and feelings, we can begin to identify patterns and triggers that may be contributing to our emotional state. This awareness allows us to take a step back and assess the situation objectively, rather than reacting impulsively based...
Read more