#python functions

[tccicomputercoaching]

Python Basics: Variables, Loops & Functions Explained Simply

🔹 Introduction to Python Programming

Python is like the cool friend who can suddenly make everything easier. Whether one is creating a calculator, automating mundane gestures, or simply dreaming of developing their own game, Python is often the first language anyone can turn to. But why?

👉 Join our full Python course to start learning step by step.

Being Python-Friendly for a Beginner

Because it has a clean readable syntax without a lot of techno babble. Python feels like English. You do not have to memorize some wild symbols or worry about setup-heavy jargon. It is just simple and direct, yet powerful.

What Can You Build with Python?

Python builds web apps, machine learning models, multimedia dashboards, even robots. Instagram, Dropbox, and Netflix all `speak` Python. Now, that is a cool thing!

🔹 Getting Started with Python

How to Install Python

To install Python and start coding, go to python.org. Click on download and install it just as you would install any application. Make sure you check the box that says "Add Python to PATH!" 

Writing Your First Python Program

Open the terminal or IDLE, and type now:

python

print("Hello, world!")

Hit Enter. Boom! You just wrote your first Python program!

🔹 Understanding Variables in Python.

What Are Variables?

Think of variables as containers; they contain data that you may want to access later. Think of it like a jar with a label- the variable stands for something we can retrieve and reuse.

python

name = "Alice"

age = 25

Here, name holds "Alice," and age holds 25.

Python Variable Naming Rules

Start with a letter or underscore (_)

Cannot begin with a number

Use snake_case for readability

Be descriptive: user_age is better than x

Different Data Types in Python

Python variables can store:

Integers: 5  

Floats: 3.14

Strings: "hello"

Booleans: True, False

Lists: [1, 2, 3]

Dictionaries: {"name": "Alice", "age": 25}

🔹 Introduction to Loops in Python

What Are Loops?

They let you execute the same set of commands repeatedly without having to copy the code a hundred times.

For Loop in Python

Perfect when you know exactly how many times to repeat something.

python

for i in range(5):

print("Loop number",i)

While Loop in Python

Perfect for when you don’t really know quite how many times you’re going to do something — you simply go on until a state-of- affairs has been met.

python

x = 0

while x < 5:

print(x)

x += 1

Loop Control Statements

break: terminates loop execution prematurely

continue: skips all statements in the current iteration and jumps to the next iteration of the loop

pass: does nothing; it is used as a placeholder

Also Read: Why Is Python A Good Programming Language For Beginners

🔹 Python Functions Made Easy

What Is a Function?

A function is a reusable block of code. It's like a recipe, one written once and used whenever a situation arises.

def greet():

  print("Hello!")

Built-in Vs User-Defined Functions

Built-in: Already present, like print(), len(), and type()

User Defined: Created by you via def.

How to Define a Function

python

def say_hello(name):

  print("Hello", name)

Call it using say_hello("Alice") 

Function Parameters and Return Values

You can pass information into a function and possibly get a result back:

python

def add(a, b):

  return a + b

🔹 Practical Examples of Variables, Loops & Functions

Simple Calculator Using Functions

python

def add(a, b):

  return a + b

print(add(10, 5))

Looping through a List of Names

python

names= ["Alice", "Bob", "Charlie"]

for name in names:

  print("Hello", name)

Using Variables to Keep Score

python

score = 0

score += 10

print("Your score is", score)

🔹 Common Mistakes Beginners Make

Variable Name Confusion

name and Name can be entirely different variables; Python is case-sensitive.

Infinite Loops

If you forget to update a variable used in a while loop, the program might never terminate.

Forget Return Statements

If a function is not specified with return, no value is returned; it simply performs an action.

🔹 Tips to Improve Your Python Skills

Practice Small Projects

Start with building a calculator, to-do app, or number guessing game.

Read Others' Code

Check out GitHub, follow tutorials, and watch how others approach a problem.

Use Online Platforms for Coding Practice

Try HackerRank, LeetCode, or Codecademy to get your practice and challenges.

Conclusion

Python is a beginner's best friend, especially once you understand the concepts of variables, loops, and functions. These concepts form the basis of almost every program. You will use these tools at every stage, from printing 'Hello World' to building a weather app.

So go ahead, code, break things, fix things, and most importantly, have fun with it. Python is always there for you!

🎓 Want to go beyond Python? Check out our full programming course library and take the next step in your coding journey.

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Note: This Post was originally published on https://tccicomputercoaching.wordpress.com/2025/05/07/python-basics-variables-loops-functions-explained-simply/  and is shared here for educational purposes.

[proeduorganization]

Python Functions

Introduction In Python, functions are reusable blocks of code that perform a specific task. They allow you to break down your program into smaller, modular components, making your code more organized, easier to understand, and easier to maintain. Functions help avoid redundancy by allowing you to reuse the same code multiple times without having to rewrite it. Defining a Function In Python,…

[machinelearningsite]

Python Functions: A Comprehensive Guide with Examples

Python, a versatile and powerful programming language, owes much of its popularity to its elegant syntax and extensive standard library. Among its many features, functions stand out as a fundamental building block for organizing and reusing code. Functions can be used for many in-code tasks such as manipulating Python lists or images for computer vision. In this comprehensive guide, we’ll delve…

[arjunphp-blog]

Python split()

The split() method in Python is used to split a string into a list of substrings based on a delimiter. Here are multiple examples demonstrating its usage. Example 1: Splitting a String by Space sentence = "This is an example sentence." words = sentence.split() # Defaults to splitting by space print(words) # Output: ['This', 'is', 'an', 'example', 'sentence.'] Example 2: Splitting a String by…

[trendingnow3-blog]

Day-6: Python Functions

Day-6: Python Fuctions - Python Boot Camp 2023

Introduction to Python functions Python functions are blocks of reusable code designed to perform specific tasks. They allow you to break down complex programs into smaller, manageable pieces. Functions enhance code reusability and readability, making it easier for developers to maintain and understand their programs. In this article, we will explore various aspects of Python functions, from…

[doubledaybooks]

These are the vibes I THE WHYTE PYTHON WORLD TOUR brings to the function bookshelf.

It's Spinal Tap meets Austin Powers.

It's an 80s themed wrestling duo alarming the interviewer.

It's Lorelei Gilmore Reading THE DIRT.

It's Ozzy Osbourne on reality TV.

It's "The Wind of Change" being used as a political battle cry.

Get ready for the world tour...

[froget-me-nots]

deskpet mikey :)

[track-maniac]

Feeling inspired by a post I saw a few months ago, I programmed a simple game of tic-tac-toe in python, in a single expression. Like regular functional programming, this means I can't mutate variables. But more than functional programming, this also means I can't

Declare variables at all

Declare functions

Use most loops and branch structures

The resulting program is 1730 characters long after removing all the non-strictly necessary whitespace and contains "lambda" 9 times.

The players are asked where they want to play using a number for each cell, in the configuration of a standard numpad. The program checks for invalid input too.

Source code under the cut

(lambda grid,toggle,players,cells_filled,print_grid,check_victory,ask_xy,validate_input,the_game:(lambda victor:print('=====\n'+('Draw.'if victor is None else f"{victor} wins!")))(the_game(grid,players,cells_filled,toggle,print_grid,check_victory,ask_xy,validate_input,the_game)))([[7,8,9],[4,5,6],[1,2,3]],True,['X','O'],0,lambda grid:print('\n'+'\n'.join(' '.join(map(str,ligne))for ligne in grid)),lambda grid,players:([player for player in players if any(set(grid[i][col]for i in[0,1,2])=={player}for col in[0,1,2])or any(set(grid[row])=={player}for row in[0,1,2])or set(grid[i][i]for i in[0,1,2])=={player}or set(grid[i][2-i]for i in[0,1,2])=={player}]+[None])[0],lambda players,toggle,grid,ask_xy,validate_input:validate_input(input(f"{players[toggle]}, place your symbol: "),grid,players,toggle,ask_xy,validate_input),lambda selection,grid,players,toggle,ask_xy,validate_input:(lambda selection,grid,players,toggle,ask_xy,validate_input:(selection%3,2-selection//3)if grid[2-selection//3][selection%3]not in players else ask_xy(players,toggle,grid,ask_xy,validate_input))(int(selection)-1,grid,players,toggle,ask_xy,validate_input)if len(selection)==1 and'0'<selection<='9'else ask_xy(players,toggle,grid,ask_xy,validate_input),lambda grid,players,cells_filled,toggle,print_grid,check_victory,ask_xy,validate_input,the_game:(print_grid(grid),the_game((lambda players,toggle,xy,grid:[[players[not toggle]if(j,i)==xy else grid[i][j]for j in[0,1,2]]for i in[0,1,2]])(players,toggle,ask_xy(players,not toggle,grid,ask_xy,validate_input),grid),players,cells_filled+1,not toggle,print_grid,check_victory,ask_xy,validate_input,the_game)if check_victory(grid,players)is None and cells_filled<9 else check_victory(grid,players))[1])

If you can't read any of this, don't worry, I can't either.

You can find the original code and a slightly more readable version on my gitlab: https://gitlab.com/Rijaja/gaae/-/tree/main/tttaae (but careful, the game is in French)

[johnono]

I'm gonna start working on my sims 4 radqueer script mod again

[moose-mousse]

I am writing in python rather than the pre 89 C shitshow at work right now..

And... I am just enjoying mixing function and object oriented design. Procedural mixed with imperative.

Just... making complex machines by swimming through the wonderfull sea of code in a modern langauge

[msharkness]

i've spent 1.5 years studying and achieving a level of C/C++ literacy to go to a class, which is really cool, basis of machine learning and genetic based algorithms and i am a sucker for biology but we're applying those in python. what sucks is that now my brain and hands literally itch to put semicolons and curly brackets and indent the code to my needs and implement methods and functions when python doesn't even use those :( and now i can do more powerful things but the code looks like we've just discovered how to paint caves with our fingers

[mutter-official]

python baby PLEEEEAAAAASEEEEE add generics. it would make my typehinting life SOOOOOO much easier

[crescentmp3]

speaking as a previous learner of C, THIS IS THE ONE MOST BEAUTIFUL THING I'VE EVER SEEN

[elkkiel]

I have a new idea for the wip list that will likely actually get made at some point, but I need to learn programming in Python first smh my head

[sevenfactorial]

This morning I misread the theorem on the board and thought it said subset instead of subspace, which was rather troubling since we used convexity in the argument. Naturally, I ask what guarantees convexity and the professor pointed out subspace so cool. Great.

But he also said "where did you pick that up? Off the street?"

Because yeah, you can use a convex set instead of subspace. But it was such an unexpected question, phrased in such an unexpected way.

[one-shitpost-a-day]

it may surprise you to know that i AM in fact attempting to start my homework but i got carried away trying to read an article about wave function collapse algorithms