IT 116: Introduction to Scripting

IT 116: Introduction to Scripting
Class 5 Exercise

Practice with interactive mode

Run IDLE on your machine
Create three variables
```
a = 4
b = 5
c = 6
```
Print the values of the variables you just created
```
(4, 5, 6)
```
Notice that you can print more than one variable at a time.
Perform some calculations using addition and subtraction
```
a + b + c
a + b - c
b - c - a
```
Perform some calculations using the division and remainder operators
```
c / a
c // a
c % a
```
Notice the difference between the two different types of division.
Perform some operations using the exponent operator
```
a ** 2
a ** 3
a ** 4
```

Perform some calculations involving operator precedence

a + b * c
(a + b) * c
a + b / c
a + b // c
a + b % c
(a + b) / c
(a + b) // c
(a + b) % c

Script for this exercise

Open a text editor
Use the editor built into IDLE.
Copy the text below into the file

Save the file as ex5.py
Run this script in IDLE
Open the script file in IDLE. Under the Run menu, select Run Module.

You should see

a: 4 b: 5 c: 6

a + b + c = 15
a + b - c = 3
b - c - a = -5

c / a  = 1.5
c // a = 1
c % a  = 2

a ** 2 = 16
a ** 3 = 64
a ** 4 = 256

a + b * c    = 34
(a + b) * c  = 54
a + b / c    = 4.833333333333333
a + b // c   = 4
a + b % c    = 9
(a + b) / c  = 1.5
(a + b) // c = 1
(a + b) % c  = 3

Copy the file to Unix

Open FileZilla and connect to pe15.cs.umb.edu
You will have to connect using your Unix username and password.
Go to your 116 directory
Go to your ex directory
Inside this directory create the directory ex5
Right-click in the whitespace inside the ex directory.
Click and drag down to Create directory.
Add ex5 to the path in the dialog box.
Click OK.
Copy your script to pe15
Click and drag your ex5.py file to the ex5 directory

Running my test script on your script (Optional)

If you want to run my text script on your Class Exercise script do the following
Connect to pe15.cs.umb.edu
Use an ssh client.
Run my test code on your script
```
~ghoffman/it116_test/ex05.sh
```
The script will prompt you for your Unix username.