Student Teaching Lesson 3.3 & 3.4
Student Teaching Notes and Homework (3.3 & 3.4)
3.3 & 3.4
Algorithms
- Sequencing
- do tasks in order
- Selection
- helps choose two different outcomes based off 1 decision
- Iteration
- if a condition is true, then it can repeat starting from a certain step until said condition is false
- Flowcharts
- show the function of an algorithms
Arithmetic Operation
- subtraction (-)
- addition (+)
- multiplication (*)
- division (/)
- Getting the remainder (MOD) (%)
- ORDER OF OPERATIONS MATTERS
- reassigning variables using operations on other variables can get confusing
Arithmetic Hacks
Num1 = 50
Num2 = Num1 % 9 + 15 # num2 = 20
Num3 = Num2 / Num1 + ( Num2 * 2 ) # num3 = 20/50 + 40 = 40.4
Num4 = Num3 + Num1 / 5 - 10 # num4 = 40.4 + 10 - 10
Result = Num4 - Num2 # Result = 40.4 - 20 = 20.4
Num1 = 10
Num2 = Num1 % 3 * 4 # num2 = 1 * 4 = 4
Num1 = Num2 # num1 = 4
Num3 = Num1 * 3 # num3 = 4 * 3 = 12
Result = Num3 % 2 # Result = 0
valueA = 4
valueB = 90
valueC = 17
valueB = valueC - valueA # valueB = 17 - 4 = 13
valueA = valueA * 10 # valueA = 4 * 10 = 40
if valueB > 10: # valueB is 13, which is greater than 10
print(valueC) # This will print 17
type = "curly"
color = "brown"
length = "short"
type = "straight"
hair = type + color + length # hair = "straightbrownshort" (concatenation)
print(hair) # This will print straightbrownshort
Noun = "Mr.Mortenson"
Adjective = "handsome"
Adjective2 = "Very"
Verb = "is"
abrev = subtring(Noun, 1, 7) # Abbreviate "Mr.Mortensen" to "Mr.Mort"
yoda = concat(Adjective2, " ", Adjective, " ", abrev, " ",Verb, ".") # yoda = VeryhandsomeMr.Mortis
display[yoda]
Noun = "Mr.Mortenson"
Adjective = "handsome"
Adjective2 = "Very"
Verb = "is"
abrev = Noun[0:7]
yoda = abrev + " " + Verb + " " + Adjective2 + " " + Adjective + "."
print(yoda)
cookie = "choclate"
cookie2 = "rasin"
len1 = len(cookie) / 2 # len1 = 4
len2 = len(cookie2) * 45 # len2 = 225
vote1 = (cookie, "vote", len2) # vote1 = choclatevote225
vote2 = (cookie2, "vote", len1) # vote2 = rasinvote4
votes = concat(vote1, " ", vote2) # votes = choclatevote225 rasinvote4
display[votes]
cookie = "choclate"
cookie2 = "rasin"
len1 = len(cookie) / 2
len2 = len(cookie2) * 45
vote1 = (cookie, "vote", len2)
vote2 = (cookie2, "vote", len1)
votes = "cookie has " + str(len1) + " votes and the second cookie has " + str(len2) + " votes."
print(votes)