Writing code makes me hungry! Let’s write a program to consider some tasty foods we’d like to eat. So far we’ve handled one of something like a name to say "hello" to or a nautical-themed object to point out. In this program, we want to eat one or more foods which we will store in a list, a variable that can hold any number of items. We use lists all the time in life. Maybe it’s your top-five favorite songs, your birthday wish-list, or a bucket list of the best types of buckets.
In this exercise, we’re going on a picnic, and we want to print a list of items to bring. You will learn to:
- Write a program that accepts multiple positional arguments.
- Use
if,elif, andelseto handle conditional branching with three or more options.
- Find and alter items in a list.
- Sort and reverse lists.
- Format a list into a new string.
| The items will be passed as positional arguments. When there is only one item, you’ll print that: $ ./picnic.py salad You are bringing salad. |
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What? Who just brings salad on a picnic? When there are two items, you’ll put "and" in between them: $ ./picnic.py salad chips You are bringing salad and chips. |
| Hmm, chips. That’s an improvement. When there are three or more items, you will separate the items with commas: $ ./picnic.py salad chips cupcakes You are bringing salad, chips, and cupcakes. |
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