🧠 Python Practice Exercises

A progressive set of hands‑on challenges—simple → intermediate → advanced—to sharpen your Python fundamentals before Python_For Pentesters_Basics and beyond.

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✅ Simple Exercises

#	Exercise	Goal / Instructions
1	Calculate the Factorial of a Number	Ask the user for a positive integer → use a loop to compute n! → return & print the result.
2	Sum of Digits of a Number	Ask for an integer → treat it as a string → loop & sum the digits → print the total.
3	Find the Minimum and Maximum in a List	Ask for a list → use min() / max() → display both values.
4	Average of Several Numbers	Ask for numbers → compute sum / len → print the average.
5	Generate a Multiplication Table	Ask for a base number & limit → loop and print n × i for each i.
6	Solve a First‑Degree Equation (ax + b = 0)	Ask for a, b → if a ≠ 0, solve x = −b/a; else decide no / infinite solutions.
7	Sum of Squares in a List	Ask for a list → square each → sum & print.
8	Average of Even Numbers in a List	Ask for a list → filter evens → average them or report none.
9	Check if a List is Increasing	Verify each element is ≤ the next → print whether ascending.

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⚙️ Intermediate Exercises

#	Exercise	Goal / Instructions
10	Find Prime Numbers in a List	Write is_prime() → apply to the list → display primes.
11	Find Multiples in a Range	Given n, a, b → loop a…b → collect numbers divisible by n.
12	Calculate the GCD (Euclid’s Algorithm)	Ask for two integers → use Euclid’s method → print the GCD.
13	Generate Fibonacci Sequence	Ask for n → loop to build the sequence → print it.
14	Find Perfect Numbers in a List	Sum proper divisors → keep numbers equal to that sum → display them.
15	Celsius ↔ Fahrenheit Converter	Ask conversion direction → apply C → F or F → C formula → print result.

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🔬 Advanced Exercises

#	Exercise	Goal / Instructions
16	Implement Selection Sort	Repeatedly find the smallest element & move it front using list.remove() → print sorted list.
17	Check if a String is a Palindrome	Ignore spaces / punctuation / case → state if it’s a palindrome.
18	Solve a Quadratic Equation	Ask for a, b, c → compute Δ = b² − 4ac → output real or complex roots.

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How to Run

# clone the repo
git clone https://github.com/your-username/python_practice.git
cd python_practice

# run any exercise
python simple_exercises/ex01_factorial.py