Task 2

\[ \begin{align}\begin{aligned}\newcommand\blank{~\underline{\hspace{1.2cm}}~}\\% Bold symbols (vectors) \newcommand\bs[1]{\mathbf{#1}}\\% Differential \newcommand\dd[2][]{\mathrm{d}^{#1}{#2}} % use as \dd, \dd{x}, or \dd[2]{x}\\% Poor man's siunitx \newcommand\unit[1]{\mathrm{#1}} \newcommand\num[1]{#1} \newcommand\qty[2]{#1~\unit{#2}}\\\newcommand\per{/} \newcommand\squared{{}^2} \newcommand\cubed{{}^3} % % Scale \newcommand\milli{\unit{m}} \newcommand\centi{\unit{c}} \newcommand\kilo{\unit{k}} \newcommand\mega{\unit{M}} % % Percent \newcommand\percent{\unit{{\kern-4mu}\%}} % % Angle \newcommand\radian{\unit{rad}} \newcommand\degree{\unit{{\kern-4mu}^\circ}} % % Time \newcommand\second{\unit{s}} \newcommand\s{\second} \newcommand\minute{\unit{min}} \newcommand\hour{\unit{h}} % % Distance \newcommand\meter{\unit{m}} \newcommand\m{\meter} \newcommand\inch{\unit{in}} \newcommand\foot{\unit{ft}} % % Force \newcommand\newton{\unit{N}} \newcommand\kip{\unit{kip}} % kilopound in "freedom" units - edit made by Sri % % Mass \newcommand\gram{\unit{g}} \newcommand\g{\gram} \newcommand\kilogram{\unit{kg}} \newcommand\kg{\kilogram} \newcommand\grain{\unit{grain}} \newcommand\ounce{\unit{oz}} \newcommand\pound{\unit{lbs}} % % Temperature \newcommand\kelvin{\unit{K}} \newcommand\K{\kelvin} \newcommand\celsius{\unit{{\kern-4mu}^\circ C}} \newcommand\C{\celsius} \newcommand\fahrenheit{\unit{{\kern-4mu}^\circ F}} \newcommand\F{\fahrenheit} % % Area \newcommand\sqft{\unit{sq\,\foot}} % square foot % % Volume \newcommand\liter{\unit{L}} \newcommand\gallon{\unit{gal}} % % Frequency \newcommand\hertz{\unit{Hz}} \newcommand\rpm{\unit{rpm}} % % Voltage \newcommand\volt{\unit{V}} \newcommand\V{\volt} \newcommand\millivolt{\milli\volt} \newcommand\mV{\milli\volt} \newcommand\kilovolt{\kilo\volt} \newcommand\kV{\kilo\volt} % % Current \newcommand\ampere{\unit{A}} \newcommand\A{\ampere} \newcommand\milliampereA{\milli\ampere} \newcommand\mA{\milli\ampere} \newcommand\kiloampereA{\kilo\ampere} \newcommand\kA{\kilo\ampere} % % Resistance \newcommand\ohm{\Omega} \newcommand\milliohm{\milli\ohm} \newcommand\kiloohm{\kilo\ohm} % correct SI spelling \newcommand\kilohm{\kilo\ohm} % "American" spelling used in siunitx \newcommand\megaohm{\mega\ohm} % correct SI spelling \newcommand\megohm{\mega\ohm} % "American" spelling used in siunitx % % Capacitance \newcommand\farad{\unit{F}} \newcommand\F{\farad} \newcommand\microfarad{\micro\farad} \newcommand\muF{\micro\farad} % % Inductance \newcommand\henry{\unit{H}} \newcommand\H{\henry} \newcommand\millihenry{\milli\henry} \newcommand\mH{\milli\henry} % % Power \newcommand\watt{\unit{W}} \newcommand\W{\watt} \newcommand\milliwatt{\milli\watt} \newcommand\mW{\milli\watt} \newcommand\kilowatt{\kilo\watt} \newcommand\kW{\kilo\watt} % % Energy \newcommand\joule{\unit{J}} \newcommand\J{\joule} % % Composite units % % Torque \newcommand\ozin{\unit{\ounce}\,\unit{in}} \newcommand\newtonmeter{\unit{\newton\,\meter}} % % Pressure \newcommand\psf{\unit{psf}} % pounds per square foot \newcommand\pcf{\unit{pcf}} % pounds per cubic foot \newcommand\pascal{\unit{Pa}} \newcommand\Pa{\pascal} \newcommand\ksi{\unit{ksi}} % kilopound per square inch \newcommand\bar{\unit{bar}} \end{aligned}\end{align} \]

Apr 28, 2026 | 330 words | 3 min read

12.2.2. Task 2#

Learning Objectives#

Determine the output of a program through hand tracking if-elif-else structures and UDFs. Investigate logical operators in Python.

Task Instructions#

Open the task template py2_team_2_teamnumber.docx and save it with your team’s number replacing teamnumber in the file name. For each exercise below, add your answers to the template. When completed, save the document as a PDF named py2_team_2_teamnumber.pdf.

Exercise A (if-elif-else)#

The Python code in Listing 12.4 is typed in after defining x and y. Assume that all other variables are cleared before the commands are executed.

Note

This exercise should be completed in Python's interactive mode. To start interactive mode, open a terminal and type python, then press Enter. You should see a prompt like >>> where you can type Python commands directly. After each command, press Enter to execute it immediately and see the result. To exit interactive mode, type exit() and press Enter.

Listing 12.4 Conditional practice.#
if x <= 50:
    z = 4
    if y < 30:
        z = x*y
    elif y >= 100:
        z = x+y

elif y >= 60:
    if x > 80:
        z = x
    elif y > 50:
        z = y
else:
    z = z*2

print('z =', z)

What will appear on the screen when the following Python commands are executed before the code in Listing 12.4 is entered?

  1. >>> x = 40
>>> y = 40

  2. >>> x = 20
>>> y = 20

  3. >>> x = 55
>>> y = 20

Exercise B (functions)#

Use hand tracking to answer the following questions about Python program in Listing 12.5. Check your work by running the code in Python's interactive mode.

  1. What is printed to the console window?

  2. What variables are in the global namespace, and what are their values?

Listing 12.5 Function practice.#
def myFun1(in1, in2):
    x = in1
    y = in2
    out1 = 6
    out1, out2 = myFun2(x, y)
    print(f'in1={in1:.0f}, in2={in2:.0f}, out1={out1:.0f}')
    return out1
# --------------------------------------------------------
def myFun2(in2, in1):
    a = in1*3
    b = in2*2
    out1 = a+b
    out2 = a-b
    print(f'in1={in1:.0f}, in2={in2:.0f}, out1={out1:.0f}, out2={out2:.0f}')
    return out2, out1
# --------------------------------------------------------
def myFun3():
    var1 = 1
    var2 = 2
    output = 3
    print(f'var1={var1:.0f}, var2={var2:.0f}, output={output:.0f}')
    output = myFun1(var1, var2)
    print(f'var1={var1:.0f}, var2={var2:.0f}, output={output:.0f}')

# --------------------------------------------------------
var1 = 4
var2 = 2
myFun3()
print(f'var1={var1:.0f}, var2={var2:.0f}')

Exercise C (logic operators)#

Create a table with four columns labeled: logic operations, hand calculation, Python calculation, and differences.

Consider the logic operations in Listing 12.6 assuming that a = True and b = False.

  1. Copy the logic operations to the first column of the table.

  2. Without using Python, determine the value of each logic operation by hand and record the results in the second column.

  3. Perform the same logic operations in Python’s interactive mode, and record the results in the third column.

  4. In the fourth column, explain any differences between the hand calculation and the Python calculation.

Note

In many programming languages, including Python, the integers \(1\) and \(0\) become True and False respectively when converted to boolean values. In these comparisons you may assume \(1\) to be equivalent to True, and \(0\) to be equivalent to False.

Listing 12.6 Logical operator practice.#
1a and b
2a or b
3a == b
4(a and b) == (a or b)
5a != b
6a > b
7a >= b
8a = b
Table 12.6 Deliverables#

Deliverables

Description

py2_team_2_teamnumber.pdf

Your answers for each part of this task.