Exercises: Data and Variables

The following exercises can be worked on within the data-analysis-projects/data-and-variables/exercises/exercises.py file!

The Data

Use the information given below about your space shuttle to complete the exercises:

The Exercises

1. Declare and assign variables

   Declare and assign a variable for each item in the list above.

   Note

   When declaring and assigning your variables, remember that you will need to use that variable throughout the rest of the exercises. Make sure that you are using the correct data type!

   Check Your Solution

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   shuttle_name = 'Determination' shuttle_speed_mph = 17500 distance_to_mars_km = 225000000 distance_to_moon_km = 38400 MILES_PER_KM = 0.621

2. Print out the type of each variable

   For each variable you declared in part A, use type() to print its type to the console, one item per line.

3. Calculate a space mission!

   We need to determine how many days it will take to reach Mars.

   1. Create and assign a miles to Mars variable. You can get the miles to Mars by multiplying the distance to Mars in kilometers by the miles per kilometer.
   Check Your Solution

   miles_to_mars = kilometers_to_mars * MILES_PER_KM

   1. Next, we need a variable to hold the hours it would take to get to Mars. To get the hours, you need to divide the miles to Mars by the shuttle’s speed.
   Check Your Solution

   hours_to_mars = miles_to_mars / shuttle_speed_mph

   1. Finally, declare a variable and assign it the value of days to Mars. In order to get the days it will take to reach Mars, you need to divide the hours it will take to reach Mars by 24.
   Check Your Solution

   days_to_mars = hours_to_mars / 24

4. Print out the results of your calculations

   Using variables from above, print to the screen a sentence that says "_____ will take ___ days to reach Mars." Fill in the blanks with the shuttle name and the calculated time.

5. Now calculate a trip to the Moon

   Repeat the calculations, but this time determine the number of days it would take to travel to the Moon and print to the screen a sentence that says "_____ will take ___ days to reach the Moon.".

   Check Your Solution

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   miles_to_moon = kilometers_to_moon * MILES_PER_KM hours_to_moon = miles_to_moon / shuttle_speed_mph days_to_moon = hours_to_moon / 24 print(shuttle_name + " will take " + days_to_moon + " days to reach the Moon.")

Submitting Your Work

When finished copy the URL to your GitHub repository for the exercises and paste it into the submission box in Canvas for Exercises: Data and Variables and click Submit.