Nutrition Facts
The U.S. Food & Drug Adminstration (FDA) offers downloadable/printable posters that “show nutrition information for the 20 most frequently consumed raw fruits … in the United States. Retail stores are welcome to download the posters, print, display and/or distribute them to consumers in close proximity to the relevant foods in the stores.”
In a file called nutrition.py, implement a program that prompts consumers users to input a fruit (case-insensitively) and then outputs the number of calories in one portion of that fruit, per the FDA’s poster for fruits, which is also available as text. Capitalization aside, assume that users will input fruits exactly as written in the poster (e.g., strawberries, not strawberry). Ignore any input that isn’t a fruit.
Hints
- Rather than use a conditional with 20 Boolean expressions, one for each fruit, better to use a
dictto associate a fruit with its calories! - If
kis astranddis adict, you can check whetherkis a key indwith code like:if k in d: ... - Take care to output the fruit’s calories, not calories from fat!
Demo
Before You Begin
Log into cs50.dev, click on your terminal window, and execute cd by itself. You should find that your terminal window’s prompt resembles the below:
$
Next execute
mkdir nutrition
to make a folder called nutrition in your codespace.
Then execute
cd nutrition
to change directories into that folder. You should now see your terminal prompt as nutrition/ $. You can now execute
code nutrition.py
to make a file called nutrition.py where you’ll write your program.
How to Test
Here’s how to test your code manually:
- Run your program with
python nutrition.py. TypeAppleand press Enter. Your program should output:Calories: 130 - Run your program with
python nutrition.py. TypeAvocadoand press Enter. Your program should output:Calories: 50 - Run your program with
python nutrition.py. TypeSweet Cherriesand press Enter. Your program should outputCalories: 100 - Run your program with
python nutrition.py. TypeTomatoand press Enter. Your program should output nothing.
Be sure to try other fruits and vary the casing of your input. Your program should behave as expected, case-insensitively.