Big Idea 1 'Identifying and Correcting Errors'
Practice with identifying and correcting code blocks
alphabet = "abcdefghijklmnopqrstuvwxyz"
alphabetList = []
for i in alphabet:
alphabetList.append(i)
print(alphabetList)
The intended outcome is to determine where the letter is in the alphabet using a while loop
- There are two changes you can make
letter = input("What letter would you like to check?")
i = 0
while i < 26:
if alphabetList[i] == letter:
print("The letter " + letter + " is the " + str(i+1) + " letter in the alphabet")
i += 1
The intended outcome is to determine where the letter is in the alphabet using a for loop
- There are two changes you can make
letter = input("What letter would you like to check?")
for i in alphabetList:
count = 0
if i == letter:
print("The letter " + letter + " is the " + str(count+1) + " letter in the alphabet")
count += 1
This code should output the evens numbers from 0 - 10 using a while loop.
- How can you change the code to only print the odd numbers in the list?
evens = []
i = 1
while i <= 10:
evens.append(numbers[i])
i += 2
print(evens)
This code should output the odd numbers from 0 - 10 using a while loop.
odds = []
i = 1
while i <= 10:
evens.append(numbers[i])
i += 2
print(odds)
This code should output the evens numbers from 0 - 10 using a for loop.
- How can you change the code to only print the odd numbers in the list?
numbers = [0,1,2,3,4,5,6,7,8,9,10]
odds = []
for i in numbers:
if (numbers[i] % 2 == 0):
odds.append(numbers[i])
print(odds)
This code should output the odd numbers from 0 - 10 using a for loop.
numbers = [0,1,2,3,4,5,6,7,8,9,10]
odds = []
for i in numbers:
if (numbers[i] % 2 == 0):
odds.append(numbers[i])
print(odds)
The intended outcome is printing a number between 1 and 100 once, if it is a multiple of 2 or 5
- 3 changes to the code will give the expected outcome.
numbers = []
newNumbers = []
i = 0
while i < 100:
numbers.append(i)
i += 1
for i in numbers:
if numbers[i] % 5 == 0:
newNumbers.append(numbers[i])
if numbers[i] % 2 == 0:
newNumbers.append(numbers[i])
print(newNumbers)
Challenge
This code segment is at a very early stage of implementation.
What are some ways to (user) error proof this code? The code should be able to calculate the cost of the meal of the user Hint:
write a “single” test describing an expectation of the program of the program test - input burger, expect output of burger price run the test, which should fail because the program lacks that feature write “just enough” code, the simplest possible, to make the test pass Then repeat this process until you get program working like you want it to work.
menu = {"burger": 3.99,
"fries": 1.99,
"drink": 0.99}
total = 0
#shows the user the menu and prompts them to select an item
print("Menu")
for k,v in menu.items():
print(k + " $" + str(v)) #why does v have "str" in front of it?
#ideally the code should prompt the user multiple times
item = input("Please select an item from the menu")
#code should add the price of the menu items selected by the user
print("Your total price is: $" + str(menu[item]))