Author: Yaman Şener

So far, your programs have probably read input from the keyboard and displayed output on the screen.

What if you could solve a big problem by solving a smaller, identical version of the same problem?

Imagine you have a list of phone numbers, but instead of accessing them by a numeric index like 0 or 1, you want to look them up by a person's name.

Python's lists are powerful, but their true flexibility comes from the built-in methods you can use to manipulate them.

So far, you may have used variables to store single values like a number or a string.

A function that does the exact same thing every time is useful, but a function that can be customized each time you call it is even better.

As your programs get bigger, you'll find yourself repeating the same blocks of code.

Imagine you need to perform the same task 100 times.

Your code often needs to choose between more than just two options.

What if you want your program to do different things based on different conditions?

It's completely normal to make mistakes when you're programming—everyone does!

Have you ever tried to print a mix of text and variable values and ended up with messy code?

In Python, a sequence of characters is called a string.

One of the most fundamental parts of programming is interacting with the user.

Are you just starting your journey with Python and wondering how to store information?