Difference between revisions of "Python List Exercises"
From WLCS
Line 21: | Line 21: | ||
# Print out the last element in numList using '''len(numList)-1''' | # Print out the last element in numList using '''len(numList)-1''' | ||
# Print out the middle element in numList using '''len(numList) // 2''' (the double division sign is intentional--it automatically rounds down) | # Print out the middle element in numList using '''len(numList) // 2''' (the double division sign is intentional--it automatically rounds down) | ||
− | # Write a loop that goes from '''0''' up | + | # Write a loop that goes from '''0''' up to '''len(numList)''' that prints out ALL the elements in numList |
# Write a loop that goes from '''len(numList)-1''' down through '''0''' and prints numList in '''reverse''' order | # Write a loop that goes from '''len(numList)-1''' down through '''0''' and prints numList in '''reverse''' order | ||
# Write a loop that prints out all the numbers in numList that are greater than 10 | # Write a loop that prints out all the numbers in numList that are greater than 10 |
Revision as of 10:14, 26 February 2018
Objectives
- You will learn to create lists
- You will learn to access elements (things) in a list
- You will learn to traverse (walk through) a list using a loop
Resources
Directions
Create a file name "ch9_yourLastName.py". In your file, complete the following exercises:
List Basics:
- Create a list named wordList that contains the following words: "washington", "lee", "generals", "arlington", "virginia"
- Print out the first element in wordList
- Print out the length of the list by using len(wordList)
- Print out the last element in wordList by using wordList[len(wordList)-1]
- Print out the word "generals" in the list
Lists with loops:
- Create a list named numList with the following numbers 3, 1, 7, 6, 4, 1, 1, 5, 4, 7, 9, 0, 9, 7, 7, 43, 2, 6, 87, 67, 4, 2, 532
- Print out the last element in numList using len(numList)-1
- Print out the middle element in numList using len(numList) // 2 (the double division sign is intentional--it automatically rounds down)
- Write a loop that goes from 0 up to len(numList) that prints out ALL the elements in numList
- Write a loop that goes from len(numList)-1 down through 0 and prints numList in reverse order
- Write a loop that prints out all the numbers in numList that are greater than 10
- Write a loop that prints out all the numbers in numList that are even (HINT: if numList[x]%2 == 0)
Adding and removing elements:
- Create an empty list [] named myList
- Add the following words to myList by using myList.append( WORD ) for each of the words:
- "The"
- "quick"
- "brown"
- "fox"
- "jumps"
- "over"
- "the"
- "lazy"
- "dog"
- Print myList to see if all the words were added
- Delete the word "brown" from the list by using del myList[ LOCATION ]
- Now delete the word "over"
- Print myList again to see if the right words were deleted
- When you are done, copy and paste the above code into a Google Doc and submit via Canvas