# Noemi Cabrera # 18 October 2021 # In this lesson, I learned how to access string characters with index. These can be postive or # negative. The positive index always starts at 0 and goes from there, therefore, the string count is going to # be minus 1. For example, a string has 5 characters, but the index count is 4. The negative indexes start with -1, # which acesses the last character of any string no matter the length. # I didn't have any difficulties in this lesson.

# [In this code, specific characters in the variable student_name are printed. The square brackets contain the # index of a character in the string "Alton". The index starts at 0 and goes until 4. ] # review and run example - note the first element is always index = 0 student_name = "Alton" print(student_name[0], "<-- first character at index 0") print(student_name[1]) print(student_name[2]) print(student_name[3]) print(student_name[4])

# [ In this code, the if/statement is used to display different answers depending on the value of the # variable student_name. If the 1st character in student_name is j or a, a winner message will display. # If the 1st character is not j or a, a message saying a match was not found will display.] review and run example student_name = "Jin" if student_name[0].lower() == "a": print('Winner! Name starts with A:', student_name) elif student_name[0].lower() == "j": print('Winner! Name starts with J:', student_name) else: print('Not a match, try again tomorrow:', student_name)

# [ The string "Tobias" has 5 characters in total, not 6 because the string index count starts at 0. # Therefore, this code displays an error message.] review and run ERROR example # cannot index out of range student_name = "Tobias" print(student_name[6])

# [ The variable street_name is assigned "Riverdale" ] assign a string 5 or more letters long to the # variable: street_name # [ To display specific letter from the word "Riverdale", the index count of the string is used. # It goes from 0 up until 4. ] print the 1st, 3rd and 5th characters street_name = "Riverdale" print(street_name[0]) print(street_name[2]) print(street_name[4])

# [ ] Create an input variable: team_name - ask that second letter = "i", "o", or "u" # [ ] Test if team_name 2nd character = "i", "o", or "u" and print a message # note: use if, elif and else team_name = input( 'Enter a team name that has "i", "o", or "u" as its 2nd letter: ' ) if team_name.lower()[1]== "i": print("You're title is correct!! Go ahead and use it for your team.") elif team_name.lower()[1]== "o": print("You're title is correct!! Go ahead and use it for your team.") elif team_name.lower()[1]== "u": print("You're title is correct!! Go ahead and use it for your team.") else: print("Sorry, your title is not valid.\nTry Again")

# [ In this code, the last character of the string "Joana" is accessed by writing [-1], which can be also # accessed by writing [4]. Then, this is stored in a variable that is printed with more strings.] # review and run example student_name = "Joana" # get last letter end_letter = student_name[-1] print(student_name,"ends with", "'" + end_letter + "'")

# [ In this code, the 2nd to last letter of Joana located in the student_name variable is accessed by writing # [-2]. ] review and run example # get second to last letter second_last_letter = student_name[-2] print(student_name,"has 2nd to last letter of", "'" + second_last_letter + "'")

# [ In this code, the third letter of Joana located in the student_name variable can be accessed in 2 ways. # You can write [3] or [-2] to access the same letter in this case. ] review and run example # you can get to the same letter with index counting + or - print("for", student_name) print("index 3 =", "'" + student_name[3] + "'") print("index -2 =","'" + student_name[-2] + "'")

# [ The variable street_name is assigned "Yellowsnow" as its value. ] assign a string 5 or more letters long to the variable: street_name # [ The negative indexes -3,-2, and -1 are used to access the last 3 letters of Yellowsnow. ] # print the last 3 characters of street_name street_name = "Yellowsnow" print("for",street_name) print("3rd to last letter:",street_name[-3]) print("2nd to last letter:",street_name[-2]) print("Last letter:",street_name[-1])

# [ ] create and assign string variable: first_name first_name = "Adriana" # [ ] print the first and last letters of name print("for",first_name,":") print("First letter:", first_name[0]) print("Last letter:", first_name[-1])

# [ The error in this code was that regular parentheses were used instead of using square brackets to # access the last letter of "tennis". To fix this, I replaced the parentheses with square brackets. ] # Review, Run, Fix the error using string index shoe = "tennis" # print the last letter print(shoe[-1])