3.2. Exercises

3.2.1. Exercise 1

Write an expression that will find the value of this arithmetic expression:

\[2\times(5+3)+4\times \dfrac{128}{ (\dfrac{16}{8})}-3^2\times (5\%2)\]

# write your code here

3.2.2. Exercise 2

Write an expression that given the following values of x = True, y = False and z = False will find out the value of the following logical expression:

\[x \; AND \; (y \; OR \; z \; OR \; (x \; AND \; z))\]

# write your code here

3.2.3. Exercise 3

Now we will modify the code from the Readings section 3.1.2.3. The user will input a grade and based on the ETH grading table you have to output the corresponding description. Find the details here. If the user inputs a number outside of the specified range then print this statement: Incorrect grade!.

grade = input('Enter the grade here: ')

# write your code here

---------------------------------------------------------------------------
StdinNotImplementedError                  Traceback (most recent call last)
Cell In[3], line 1
----> 1 grade = input('Enter the grade here: ')
      3 # write your code here

File ~/.cache/pypoetry/virtualenvs/python_for_food_scientists-OgywevK--py3.9/lib/python3.9/site-packages/ipykernel/kernelbase.py:1190, in Kernel.raw_input(self, prompt)
   1188 if not self._allow_stdin:
   1189     msg = "raw_input was called, but this frontend does not support input requests."
-> 1190     raise StdinNotImplementedError(msg)
   1191 return self._input_request(
   1192     str(prompt),
   1193     self._parent_ident["shell"],
   1194     self.get_parent("shell"),
   1195     password=False,
   1196 )

StdinNotImplementedError: raw_input was called, but this frontend does not support input requests.

3.2.4. Exercise 4

We have a list of fermented food, but we do not like everything that is there. More precisely, the list contains the following items: milk, yoghurt, beer, cider, tempeh, sauerkraut and kefir. We do not like: milk, cider and kefir. So we need to print everything except of these 3 foods. Write a program to accomplish this using a while loop.

fermented_food = ['milk', 'yoghurt', 'beer', 'cider', 'tempeh', 'sauerkraut', 'kefir']

# write your code here

3.2.5. Exercise 5

Repeat exercise 4 using a for loop this time but when we encounter sauerkraut we do not want to continue looping anymore.

# write your code here

3.2.6. Exercise 6 (Optional - Bonus)

Using a loop structure (either for or while) draw a Christmas tree with a base of 5 stars using asterisks(*). The output should look like this:

# write your code here