Task 2

1. first_name asks for "Last name"
2. last_name asks for "First name"
3. last_name input is missing a bracket before the input string
4. fullname variable uses non existent "Firstname" variable rather than "first_name" variable
5. full_name initialization uses "&" symbol instead of "+" symbol to concat strings
6. Prin function has capital P where it shouldn't
7. Prin function is misspelled, meant to be "print"
8. fullname init does not use lastname variable but uses a string containing "lastname"
9. fullname uses nonexistent variable "lastname" rather than "lastname" variable
10. fullname forgets to close string literal 11. fullname forgets to close the string literal and concat lastname into the string 12. fullname has too many spaces between the beggining of the string and the "&" symbol

Part B

10.2: debugging.py

  x = 1
first_name = "John"
last_name = "Doe"
full_name = f"{first_name} & {last_name}"

print("Enter your first name: " + first_name)
print("Enter your last name: " + last_name)

while (x < 10):
    print(full_name)
    x += 1

  

Output

  >>> Enter your first name: John
>>> Enter your last name: Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
>>> John & Doe
  

Task 3

x at start of loop	number_int after calc	x at end of loop
1	2	2
2	4	3
3	8	4
4	16	5
5	32	6
6	64	7
7	128	8

The following is the code that helped me get the above table

I used VSCode's built in debugger to debug the code, and get the values at each point.

Source: 10.3 numbers.py

number = 1
x = 1

while(x < 5):
    number = number * 2
    x = x + 1

print("Answer =", str(number))

I also improved upon that code as follows

Source: 10.3 numbers improved.py

from math import pow

print("Answer =", int(pow(2, 4)))

It yields the same output, except we have to use int to convert the float to an integer. Python really does work in mysterious ways

Output: 10.3 numbers improved.py

>>> Answer = 16

Output: 10.3 numbers.py

>>> Answer = 16

Task 4

This was the task where we added print statements to understand the values better at each point of execution

10.4: tracing.py

  number = 1
x = 1

print("Enter an integer: " + str(number))

while(x < 5):
    print(f"x at start of loop = {str(x)}")
    print(f"number at start of loop = {str(number)}")
    number = number * 2
    x = x + 1
    print(f"x at end of loop = {str(x)}\n")


print("Answer =", str(number))

  

Output

  >>> Enter an integer: 1
>>> x at start of loop = 1
>>> number at start of loop = 1
>>> x at end of loop = 2
>>> x at start of loop = 2
>>> number at start of loop = 2
>>> x at end of loop = 3
>>> x at start of loop = 3
>>> number at start of loop = 4
>>> x at end of loop = 4
>>> x at start of loop = 4
>>> number at start of loop = 8
>>> x at end of loop = 5
>>> Answer = 16