Question

11. First and Last Design a program that asks the user for a series of names (in no particular order). After the final person's name has been entered, the program should display the name that is first alphabetically and the name that is last alphabetically. For example, if the user enters the names Kristin, Joel, Adam, Beth, Zeb, and Chris, the program would display Adam and Zeb.

#Sentinel value is DONE
SENTINEL = "DONE"
ls = []

prompt = "Enter a name, or enter DONE to quit."

newLs = input(prompt)

n = newLs

#test for sentinel
while newLs != SENTINEL:
ls.append(newLs)
newLs = input(prompt)
#sort in alphabetical
for i in range(n) :
name = int()
ls.append(name)
ls.sort()

print('{} and {}'. format(ls[0],ls[n-1]))
I need help with sorting the names from the sentinel loop so that I get only two outputs that are alphabetically ordered

Answer 1

As per your requirement, here is the Python code:

Rawcode:

#Sentinel value is DONE

SENTINEL = "DONE"

#creating a list to store the names

ls = []

#prompt variable which stores the string that says enter a name or enter done to quit

prompt = "Enter a name, or enter DONE to quit."

#prompting user for input name

newLs = input(prompt)

#while loop whcih runs until user enters DONE

while newLs != SENTINEL:

    #appending each input name to the list

    ls.append(newLs)

    #keep on asking the user to enter the input name until user enters DONE

    newLs = input(prompt)

#sort in alphabetical

ls.sort()

#as the list is sorted we have to print the first value of list and last value of list

#first value can accessed by using index value 0 and last value can be accessed by subtracting one from lenght of list

print('{} and {}'. format(ls[0],ls[len(ls) - 1]))

Here is the screenshot of source code:

Here is the screenshot of output:

Hope this helps you. Please feel free to ask if you still have any queries.

Do upvote. Thank you !