Python 1: Introduction to Python

Python 1: Introduction to Python
Class 3 Exercise

Practice with interactive mode

Enter Python interactive mode
```
python3
```

Print the the name of our University

>>> print("University of Massachusetts at Boston")

Print our street address
```
>>> print("100 Morrissey Boulevard")
```
Print our city and state
```
>>> print("Boston, Massachusetts")
```
Print our zip code
```
>>> print("02125-3393")
```
Write a comment
```
>>> # Hello world!
```
Nothing prints because the Python interpreter ignores everything after #.
Create a variable
```
>>> number = 20
```
Print the value of the variable you just created
```
>>> print(number)
```
Change the value of the variable
```
>>> number = number + 1
```
Print the new value of this variable
```
>>> print(number)
```
Quit interactive mode

exit()

Code for this Exercise

Create the code ex3.py
Enter the following text into the python code file

Run the code
```
python3  ex3.py
```

You should see

a + b + c =  21
a * b + c =  40
a * b * c =  300
c - b - a =  -1
a * b / c =  3.0

University of Massachusetts at Boston
100 Morrissey Boulevard
Boston, Massachusetts
02125-3393

Upload your ex3.py file