Python Python 3

Python : Working with the Python Interactive Shell

We are going to be writing our first program through the Python interactive shell. Before we begin, ensure that you have Python installed on your machine.

Checking our Python Installation

Step 1 : Open the terminal

Step 2 : Type in the command python3 and press Enter. This should open the Python interpreter, and you should see a message containing the Python version you installed.

python3

Working with the Python

Step 1 : At the terminal, enter the following command to run the popular Hello World! program:

print("Hello World!")

Step 2 : Anything you type into the shell is echoed back. Type "Echo" in the shell to check this

"abcd"
1234

Step 3 : You can even do some calculations

14 + 3
12 - 3
12*3
-5 + 6*8

Step 4 : Exit the shell by running the exit command

exit()