Exercise

Today, we're going to explore variables in Python. Can anyone tell me what a variable is?

Isn't it a way to store data?

That's correct! A variable is like a container that holds information. For instance, if I say name = 'Alice', I'm creating a variable named name that stores the string 'Alice'.

Are variable names case-sensitive?

Yes, they are. name and Name refer to two different variables. Remember, a good way to recall this is that Python is like a detective - it respects the details!

Now, let's move on to data types. Python has several built-in data types. Student_3, can you name any?

There's int, float, and str, right?

Exactly! int for integers, float for decimal numbers, and str for strings. Remember, you can identify a variable's type using the type() function.

Let’s see how we can check a variable's type in Python. Can someone tell me what the command is?

It's type()!

Exactly! If I have a variable called city, I can use print(type(city)) to see what type of data it holds. It's a helpful way to debug our code.

Next, let’s discuss type conversions or casting. Who can tell me why we might need to convert data types?

I think it's because sometimes we get data in a different format than we need!

Perfect! For example, if we have a string '100', we can convert it to an integer using int(). Can someone show me an example?

I could write y = int('100') and now y would be 100!