Department of Computing
CS-213: Advanced Programming
Class: BSCS-8ABC
Lab 10: Functional Programming - Exploring Haskell
Instructors: Dr. Sidra Sultana and Dr. Sana Qadir
Note: The steps to be completed are labelled as S# and the questions to be answered are
numbered as Q#.
This lab explores the use of the very safe functional language Haskell.
S1: Install Haskell Platform
● Use instructions from https://www.haskell.org/platform/windows.html to install Haskell
Platform
● You can confirm installation of haskell-dev:
S2: Getting started with Haskell
● Create a folder week11. Create a new file called program1.hs.
● You may use VS Code with Haskell and H askell Syntax Highlighting
extension to edit this file.
● Open a PowerShell and navigate to the week11 folder.
● At the prompt, enter ghci.
● Edit program1.hs as shown:
● Load program1.hs using :l program1.hs
● Find out value of maxInt and m
inInt as shown:
● Edit program1.hs as shown. Replace 1000 with the last four digits of your CMS ID.
● Save program1.hs, reload it using :r.
● Print the value of each of the three variables by entering them one by one at the prompt.
Take SCREENSHOT 1 showing the value of the three variables.
S3: Investigating a function
● Find out about the square root function by entering it at the prompt as shown:
● Edit program1.hs, to find the square root of sumOfNums as shown:
● Save and reload (using :r)
● Investigate some built-in mathematical functions (eg. exp, log, **, truncate, and
round) and some built-in logical functions (e.g. &&, ||, and not()).
● Add code to calculate the square root of your CMS ID rounded to the nearest integer
value.
● Take SCREENSHOT 2 showing the value.
S4: Lists
● Understand the following code. It may help to test out some of these examples:
● Write one line of Haskell to do each of the following:
a. Create a list myCMSID consisting of the digits in your CMS ID. There should be at
least eight digits in this list. Reverse this list.
b. Create a list myNewCMSID by prepending this list with the four digits that make
up the year in which you were born.
c. Create a variable maxDigit and assign it the maximum digit in the list
myNewCMSID.
d. Create a variable is8 that checks if the digit 8 occurs in myNewCMSID.
Take SCREENSHOT 3 showing your code and the value of all four of these variables.
● Write one line of Haskell to do the following:
e. auto generate and filter a list of numbers between 2000 and 5000 that are
divisible by 9 and 13.
Take SCREENSHOT 4 showing your code and the output.
S4: Going deeper
● Find out what the zipWith function does. Write one line of Haskell that:
f. uses zipWith with *, myCMSID, and the list created in e.
Take SCREENSHOT 5 showing your code and the output.
Q1: What do you notice from the output about what the zipWith function does and the
length of the output produced.
● Write two lines of Haskell to create the multiplication table shown below:
Take SCREENSHOT 6 showing your two lines of code.
Hint: the first line of the code should generate a multi3List list.
You may use the following for reference “Chapters - Learn You a Haskell for Great Good!”
SUBMISSION: Instructions
● Convert the following into one PDF file and upload on the LMS submission link by the
due date:
○ Screenshot 1 to 6.
○ Answers to Q1
