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Start Programming with Python Instantly!

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Do you wish to study Python because you’re a programming enthusiast?
Are you a beginner when it comes to coding?
Do you need some guidance on where to start with Python?
You’ve come to the right place if you’re looking for solutions to these questions.

Python is a popular programming language for developing web and desktop apps, analyzing data, and executing DevOps operations because it is simple to learn, use, and deploy.
It is an object-oriented coding language that may be used to construct basic scripts as well as sophisticated programs.
Python is one of the greatest programming languages to learn first out of the almost 700 available.

Python installation

Before we go into the foundations of Python, you must first download and install Python on your computer.
Python runs on a variety of operating systems, including Linux, Windows, and Mac.
Most Mac and Linux systems have it preloaded; however, you should download the most recent version from the official Python website.

Open a command prompt and execute “python -V” to see what Python version is currently installed on your system.

at the command prompt

If your current version is outdated, you can download the 32-bit or 64-bit setup from the website, depending on your system requirements.

There are additional options for getting the setup: you can get it directly from Microsoft for Windows.
Install it via the package manager on Linux.
You may get it through Homebrew for macOS.

After downloading the setup, run the file installer and select “Install Now.”
You’re ready to go after the installation is finished.
An example of a Python installation for Windows is shown below.

install Python

It is crucial that you Add Python 3.9 to PATH.

TEST if Python has been installed or not

To test whether Python is installed and operating properly in Windows, open a command prompt and type “python,” which will launch the Python interpreter.

Python interpreter
It allows you to run Python code directly.
For instance, input “2*5+1” and hit “enter.”
As a result, you’ll see “11” as the output.
The interpreter will be exited if you type “quit ()”.

Python interpreter in an integrated development environment (IDE)

Now that you have the most recent version of Python installed, you may begin programming in Python.
Use Python’s built-in Integrated Development and Learning Environment while building large scripts or programs (IDLE).

Start IDLE and then pick “New File” from the File dropdown, which opens a new editing window.
So now you have two windows on your screen: a Python shell and an untitled file.

Python shell and untitled file

The Python shell is a REPL environment (read-eval-print loop), which stands for “read-eval-print loop.”
It executes code snippets, usually one statement at a time.
You can show how a Python shell can work as a calculator by doing the same calculation “2*5+1” that we did in the command prompt.

As a calculator, Python

Python as a calculator

The untitled window is a text editor that can be used to create full programs.
The output of the shell is displayed.
For example, the standard first Python program for beginners is to print “Hello World!”
Before using the text editor, make sure you save it by pressing “F5”.

Hello World

Fundamentals of Python

We understand that you are eager to begin writing big scripts for video games and websites, but you still have a long way to go.
You must first master the fundamentals of Python, just as you would any other language.

As seen in the Hello World! For example, the print() function prints a value to the output window.
A value is the most fundamental component of a program.
A text, a numeric value, or any other Python object can be used.
A string is an object enclosed in single or double quotation marks.
For example, the string “Hello World!” displayed in the preceding program is also of the type string.
Numeric numbers like 4 and 4.5 are the kinds of integers and floats, respectively.
Using the built-in functions int(), float(), and str(), you can convert an integer or float to a string and vice versa ().

value in an output window

an output window’s value

The Python lexicon

Python is the most basic programming language.
It is simple to read and comprehend.
Python, unlike human languages, has a limited vocabulary and reserved words with unique significance.
Variables are terms that have no significance outside of this restricted lexicon.
These 35 words have been set aside:

Python terms

Python jargon

To prevent misleading the Python interpreter and creating a syntax error, make sure you use these words for their intended purpose.

Variable names

You may want to save values in your code for later retrieval, which you may accomplish by giving them symbolic names known as variables.
We tell Python to save 5 and 6 with the names x and y, respectively, and then retrieve them later to find their sum, as shown below.

variables to be saved

storing variables

There are rules for naming variables, and if you don’t follow them, you’ll get a syntax error.
The following are some mandatory rules:

  • The name can be made up of letters and digits, but it must not begin with a number.
  • To separate numerous words, and underscore might be used in the name.
  • Special characters such as @#$ are prohibited and should not be used in the name.
  • Variable names should not contain Python keywords.

Understanding the difference between operators and operands

For simple mathematical computations, Python uses special symbols called “operators.”
Operands are the values to which these operators are applied.
Subtraction, addition, division, multiplication, and exponentiation are represented by the symbols -,+, /, *, and **, respectively.

symbols for operators

operators’ symbols

The residual of the first operand divided by the second operand is output by the modulus operator (percent).
It can be used to determine whether a number is divisible by another and to extract the number’s rightmost digit/digits.

operator modulus

modulus operator

Making use of expressions

An expression is a collection of values, variables, and operators.
The answer is displayed once an expression typed in the shell is evaluated.
In a script, however, an expression has no effect on its own.

Python’s operators follow the PEMDAS mathematical standard, which means that P for Parentheses has precedence, followed by Exponentiation, Multiplication, and Division, all of which have the same priority.
Following that are addition and subtraction, both of which have the same precedence.
Operators with the same choice are ranked from left to right as well.

PEMDAS

PEMDAS

For concatenation and repeating a string, the Addition and Multiplication operators both operate with strings.

addition and multiplication operators

operators for addition and multiplication

Python also allows you to get a user’s input for a variable via their keyboard.
This can be accomplished with the help of a built-in function named input.

 

Create your first computer program.

Now it’s time to put everything you’ve learned so far into practice by writing a simple program.
Create a script that takes two numbers and adds them together.
Do it on your own and use the code below to keep track of your progress.

make a quick program

write a short program

Congratulations!
You’ve just finished writing your first program.

Python is a simple and entertaining language to learn.
We only assisted you in getting past the fundamentals.
You still have a lot to study and practice in order to become a professional Python programmer.
Best of luck on your quest to become a master coder.

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