# Noemi Cabrera # 26 october 2021 # In this lesson, I learned to create lists by using square brackets [] and separating # each item with commas. Lists can be made out of strings, integers, variables, or a # mix of them. To access a specific item in a list you use string slicing that is zero # based. So, the index count for the items starts at 0, not 1. Also, you can add # different items once you slice them. # I didn't have any difficulties in this lesson.

# [ The variable ft_bones is assigned a list made out of strings as its value. A list contains comma # separated objects enclosed in square brackets. Then the type of the variable is displayed, which is # list, by using type().] review and run example # define list of strings ft_bones = ["calcaneus", "talus", "cuboid", "navicular", "lateral cuneiform", "intermediate cuneiform", "medial cuneiform"] # display type information print("ft_bones: ", type(ft_bones)) # print the list print(ft_bones)

# [ The variable age_survey is assigned a list made out of integers as its value. Then the type of the # variable is displayed, which is list, by using type(). ] review and run example # define list of integers age_survey = [12, 14, 12, 29, 12, 14, 12, 12, 13, 12, 14, 13, 13, 46, 13, 12, 12, 13, 13, 12, 12] # display type information print("age_survey: ", type(age_survey)) # print the list print(age_survey)

# [ The variable mixed_list is assigned a list made out of strings, integers, and lists as its value. # Even though the list has different data types, the type will still be list.] review and run example # define list of mixed data type mixed_list = [1, 34, 0.999, "dog", "cat", ft_bones, age_survey] # display type information print("mixed_list: ", type(mixed_list)) # print the list print(mixed_list)

# [The team_names variable contains a list of strings that are team names. ] create # team_names list and populate with 3-5 team name strings team_names = ["Golden stars", "Rolling Stoners", "Full Spirit", "Rock for Life", "Crafty Crew"] # [ The list is printed by putting the variable containing the list in print()] # print the list print(team_names)

# [ The list created contains both integers and strings separarted by commas.] Create # a list mix_list with numbers and strings with 4-6 items mix_list = [1, "bread", 2, "oranges", 5, "potatoes"] # [ The variable mix_list contains the list created, therefore, the list is displayed. ] # print the list print(mix_list)

# [ Each item is separated with commas and they're counted starting with index 0. # In this case, the index count of the 1st bone in the list ft_bones is 0. # The 2nd bone is index 1, and so on. ] review and run example print(ft_bones[0], "is the 1st bone on the list") print(ft_bones[2], "is the 3rd bone on the list") print(ft_bones[-1], "is the last bone on the list")

# [Here, the 2nd and 4th bone are accessed by writing their index count, which is 1 and # 3. Both are used in the same sentence. ] review and run example print(ft_bones[1], "is connected to the",ft_bones[3])

# [ The sum of the first 3 ages is cointained in the variable three_ages. The ages are # slices of the list found in age_survey. Then the sum of these ages is printed. ] # review and run example three_ages_sum = age_survey[0] + age_survey[1] + age_survey[2] print("The first three ages total", three_ages_sum)

# [ The variable streets contains a list of street names. ] Create a list, streets, that lists the name of 5 street name strings streets = ["Main","Yellowsnow","Church","Maple", "Allen"] # [ The first street name (index 0) is printed with the message that says it has no # parking. ] print a message that there is "No Parking" on index 0 or index 4 streets print(streets[0],"street: 'No Parking'")

# [ The variable num_2_add contains a list made out of 5 integers. ] # Create a list, num_2_add, made of 5 different numbers between 0 - 25 num_2_add = [7, 8, 14, 19, 25] # [The variable is sliced to access each integer in the list and then these are added # using the + sign. ] print the sum of the numbers print(num_2_add[0]+ num_2_add[1] + num_2_add[2] + num_2_add[3] + num_2_add[4])

# [ The error in this code is that the variable play_checks is not assigned a value before # using it. Therefore, Python cannot do the sum. ] Review & Run, but ***Do Not Edit*** # this code cell # [ ] Fix the error by only editing and running the block below print(" Total of checks 3 & 4 = $", pay_checks[2] + pay_checks[3])

# [ To fix the problem above, I assigned the pay_checks variable a list value made with # integers. Then I placed the same code of above after I defined the variable to display # the sum of the checks 3 & 4.] Fix the error above by creating and running code in # this cell. pay_checks = [110, 190, 260, 300, 100, 230] print(" Total of checks 3 & 4 = $", pay_checks[2] + pay_checks[3])