PROBLEM0.4.md

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Einstein

Even if you haven’t studied physics (recently or ever!), you might have heard that E = mc², wherein E represents energy (measured in Joules), E represents mass (measured in kilograms), and represents the speed of light (measured approximately as 300000000 meters per second), per Albert Einstein et al. Essentially, the formula means that mass and energy are equivalent.

In a file called einstein.py, implement a program in Python that prompts the user for mass as an integer (in kilograms) and then outputs the equivalent number of Joules as an integer. Assume that the user will input an integer.

Hints

• Recall that input returns a str, per https://docs.python.org/3/library/functions.html#input.
• Recall that int can convert a str to an int, per https://docs.python.org/3/library/functions.html#int.
• Recall that Python comes with several built-in functions, per https://docs.python.org/3/library/functions.html.

Before You Begin

From the root of your repository execute cd 0-FunctionsVariables So your current working directory is ...

	/0-FunctionsVariables $:

Next execute

	mkdir einstein

to make a folder called einstein in your codespace.

Then execute

	cd einstein

to change directories into that folder. You should now see your terminal prompt as /0-FunctionsVariables/einstein $. You can now execute

	code einstein.py

to make a file called einstein.py where you’ll write your program.

How to Test

Here’s how to test your code manually. At the einstein/ $ prompt in your terminal: :

1. Run your program with python einstein.py. Type 1 and press Enter. Your program should output:

    90000000000000000

2. Run your program with python einstein.py. Type 14 and press Enter. Your program should output:

    1260000000000000000

3. Run your program with python einstein.py. Type 50 and press Enter. Your program should output:

    4500000000000000000

Commit your program to GITHUB

At the /0-FunctionsVariables/einstein $ prompt in your terminal:

	git add -A 

Add all changed files in the repository to be committed

	git commit -m “Upload completed einstein.py“

Commit all changes in the REPO with the comment “Upload completed einstein.py“ note: If the file is not complete, adjust the comment to describes what is being commited

	git push 

Push all changes to the REPO