Loops (Need) Exercises

Exercise 1 (Celsius to Fahrenheit) ☻

You are provided with the following list of temperatures in Celsius. Write a quick Python snippet that converts each temperature to Fahrenheit and prints both temperatures as a Celsius, Fahrenheit pair.

temperatures_celsius = [
    0, 5, 10, 15, 20, 25,
    30, 35, 40, 45, 50
]

Exercise 2 (Multiplication table) ☻

You can put a loop within a loop to do doubly loopy stuff. Here is an example:

for letter in ['A', 'B', 'C']:
    for number in [1, 2, 3]:
        print(f'{letter}{number}', end='\t')
    print('\n')
A1  A2  A3  

B1  B2  B3  

C1  C2  C3

Try this out and explore.

Write a Python snippet that prints a multiplication table (up to 5) for numbers 1 through 5 using nested for loops. The output should be formatted as shown below:

1 : 1   2   3   4   5   
2 : 2   4   6   8   10  
3 : 3   6   9   12  15  
4 : 4   8   12  16  20  
5 : 5   10  15  20  25

Exercise 3 (Simulating a Coin Flip Experiment)  

Let’s use NumPy to simulate a simple experiment. NumPy has a random module that allows us to generate random numbers. We can generate 10 numbers between 0 and 1 by:

np.random.rand(10)
array([0.87820881, 0.51408832, 0.5028915 , 0.59833137, 0.76499243,
       0.40666847, 0.58407205, 0.00879205, 0.54712811, 0.95816881])

We can use this to simulate coin flips of a fair coin by considering values less than 0.5 as tails and values greater than 0.5 as heads. For example, in the above ‘experiment’ we have 8(!) heads.

Using a for loop, run this experiment 10 times and, for each iteration, print out the number of heads.

Your results should look something like:

Experiment  1: No. of Heads = 4
Experiment  2: No. of Heads = 2
Experiment  3: No. of Heads = 8
Experiment  4: No. of Heads = 5
Experiment  5: No. of Heads = 8
Experiment  6: No. of Heads = 5
Experiment  7: No. of Heads = 4
Experiment  8: No. of Heads = 6
Experiment  9: No. of Heads = 2
Experiment 10: No. of Heads = 4

Note that your numbers will not be the same as mine, because the numbers are meant to be random!

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