Challenge 1-2: Maths

Maths Basics

Now it's time to start writing some instructions for computers!

The first thing you need to do is open a program called the Python Shell, which will allow you to start writing instructions. Open this link in a new tab to get access to the Shell: https://www.python.org/shell/

Let's get started with some very simple math.

Go ahead and type these expressions one at a time. After each one, hit the Enter key and see what happens.

>>> 1 + 2

>>> 12 - 3

>>> 9 + 5 - 15

We're using some symbols you already know - the plus and minus signs. In the programming world, we call these operators.

Operators
add +
subtract -

By the way, you have just started writing python!