Computer Bugs Original Powerpoint By: Spring LIS4480 Coding Team Jon

Why Coding?

PB&J Programming

Instructions Work with your group Write instructions for how to make a peanut-butter and jelly sandwich

PB&J Program 1.Take a slice of bread 2.If the jar is not open, Open the jar of peanut butter by twisting the lid counter clockwise 3.Pick up a knife by the handle 4.Insert the knife into the jar of peanut butter 5.Withdraw the knife from the jar of peanut butter and run it across the slice of bread 6.Take a second slice of bread 7.Repeat steps 2-5 with the second slice of bread and the jar of jelly 8.Press the two slices of bread together such that the peanut butter and jelly meet

Download Hackety! Michael

alert “Hello world!” What happens if we type this and hit run?

alert Displays a window “Hello world!” Is a string Think of it as a “string” of letters

name = ask “What is your name?” alert “Hello “ + name What is different?

name Variable Or nickname ask Displays a window with a text box

write a program that tells a joke

PB&J 1.Take a slice of bread 2.If the jar is not open, Open the jar of peanut butter by twisting the lid counter clockwise 3.Pick up a knife by the handle 4.Insert the knife into the jar of peanut butter 5.Withdraw the knife from the jar of peanut butter and run it across the slice of bread 6.Take a second slice of bread 7.Repeat steps 2-5 with the second slice of bread and the jar of jelly 8.Press the two slices of bread together such that the peanut butter and jelly meet

answer = ask “Is the jar open?” if answer == “No” alert “Open the jar.“ end Try answering with “No” and “no”. What is different?

answer = ask “Is the jar open?” if answer == “No” alert “Open the jar.“ end We’re asking if answer is equal to “No”.

answer = ask “Is the jar open?” if answer == “No” alert “Open the jar.“ end We’re asking if answer is equal to “No”.

answer = ask “Is the jar open?” if answer == “No” alert “Open the jar.“ else alert “Do not open the jar.“ end We can also tell the computer to do something else.

answer = ask “Is the jar open?” if answer == “No” alert “Open the jar.“ else alert “Do not open the jar.“ end Try answering with “Yes” and “No”. What is different?

Write a guessing game Aaron

secret = 42.to_s guess = ask “What is the secret?” Complete the program.

secret = 42.to_s guess = ask “What is the secret?” if guess == secret alert “Correct!“ else alert “Wrong!“ end Completed program.

alert 1 alert alert alert 8 / 2 alert 5 * 1 We can tell the computer to do math too

alert 1 alert 2 alert 3 Display the numbers 1, 2, 3

alert 1 alert 2 alert 3 alert 4 alert 5 alert 6 alert 7 alert 8 alert 9 What if we wanted to count higher?

alert 1 alert 2 alert 3 alert 4 alert 5 alert 6 alert 7 alert 8 alert 9 What if we wanted to count higher?

number = 1 9.times do alert number number = number + 1 end Does the same thing as before!

number = 1 9.times do alert number number = number + 1 end Make number = 1

number = 1 9.times do alert number number = number + 1 end do stuff until end 9 times

number = 1 9.times do alert number number = number + 1 end do stuff 9 times, end

number = 1 9.times do alert number number = number + 1 end Does the same thing as before!

secret = 42.to_s guess = ask “What is the secret?” if guess == secret alert “Correct!“ else alert “Wrong!“ end Can you change the code to ask “What is the secret?” 3 times?

secret = 42.to_s 3.times do guess = ask “What is the secret? You get 3 guesses!” end if guess == secret alert “Correct!“ else alert “Wrong!“ end Why does the program keep asking if we guess correctly?

secret = 42.to_s 3.times do guess = ask “What is the secret? You get 3 guesses!” if guess == secret break end if guess == secret alert “Correct!“ else alert “Wrong!“ end We need to tell the computer to break, or stop, if the guess is correct.

Let’s meet Turtle …not these turtles Michael

Turtle.start do end What happens if you run this program?

Turtle.start do forward 100 end We need to tell Turtle to do something.

Turtle.start do turnright 90 end What does turnright 90 do?

Turtle.start do forward 100 turnright 90 forward 100 end We can combine directions. Can you make Turtle draw a square?

Turtle.start do forward 100 turnright 90 forward 100 turnright 90 forward 100 turnright 90 forward 100 turnright 90 end

Turtle.start do 4.times do forward 100 turnright 90 end With a loop things get easier!

Can you make Turtle draw an octagon?

Turtle.start do 8.times do forward 100 turnright 45 end

Turtle.start do background darkred pencolor gold 8.times do forward 100 turnright 45 end We can change the color of the background and the pencolor.

Code this and customize it! Have fun and be creative! Harrison

Creative Contest Draw something using turtle. Don’t be afraid to ask for help! Skittles?

Conclusion We hope you enjoyed the lessons please let us know what you learned in the survey! If time is permitting let’s make something! P.S. We are getting graded on this