Lab 2: Python Variables, Statements, and Expressions

Introduction

In this lab, you'll explore the fundamental building blocks of Python: variables, statements, and expressions. By the end, you'll have a solid understanding of how to create variables, write statements, and perform calculations using expressions.

Objectives

• Understand the concept of variables and how to assign values to them.
• Learn to use basic arithmetic operators and write expressions.
• Recognize the difference between expressions and statements.
• Explore the print function for displaying output.
• Practice using the import statement to access modules and their functions.

Part 1: Variables and Assignments

1. Create variables:
   • Create a new file named lab02.py and assign the following values to variables within it:
     • name = "Your Name"
     • age = 20 (or your actual age)
     • height = 5.7 (or your actual height in feet)
     • favorite_color = "Blue" (or your favorite color)
2. Printing Techniques for variable values:
   • 1. Print one variable at a time:
     • Print the value of each variable individually using separate print statements.
   • 2. Print with one print statement and commas:
     • Print the values of all variables in a single print statement, separating them with commas.
     • Does it add a space between the variables?
   • 3. Print with Python formats or format specifiers:
     • Use Python's string formatting capabilities to print the variables in a more structured way.
     • Here's an example with only 2 of your variables.:

       print(f"Hello: {name} my is {favorite_color}!")

     • Note the "f" at the beginning of the string tells Python to "format"
     • Try different format specifiers to control the output (e.g., {:d} for integers, {:f} for floats).
       • Interact with your friendly AI chatbot of choice to get some examples of how to do this, and add statements to your code.
   • 4. Print with format specifiers within a multi-line string:
     • A multi-line string is a string that spans multiple lines. It is defined using triple quotes (""").
     • Use format specifiers within a multi-line string to create a formatted output.
     • Here's an example with 2 of the variables you previously defined, you need to include them all:

       print(f"""
       Name: {name}
       Age: {age}
       """)

     • Test what happens if you add extra spaces at the beginning of the lines of multi-line strings?
3. Create a new variable:
   • Similar to last week, calculate the area of a circle with a radius of 5, but this time store the result in a variable named circle_area.
   • Print the value of circle_area to ONLY 1 decimal place.

Part 2: Statements and Modules

1. Import the math module:
   • Use the import statement to import the math module.
2. Calculate the square root:
   • Use the sqrt function from the math module to calculate the square root of age.
   • Print the result.
3. Calculate the sine and cosine:
   • Use the sin and cos functions from the math module to calculate the sine and cosine of height.
   • Print the results.

Part 3: Expressions and Operators

1. Arithmetic operations:
   • Use arithmetic operators (+, -, *, /, //, %, **) to perform calculations.
   • Calculate the following:
     • The sum of age and 5.
     • The difference between height and 4.
     • The product of age and height.
     • The quotient of height and 2.
     • The remainder of age divided by 3.
     • age raised to the power of 2.
2. Print the results:
   • Use print to display the results of each calculation. Choose your preferred print formatting from the previous exercise.

Part 4: Temperature Conversion

1. Create a temperature conversion program:
   • Write a program that converts Fahrenheit to Celsius.
   • Prompt the user to enter a temperature in Fahrenheit.
     • HINT: the input function will be necessary, and it takes the prompt string as the first argument.
   • Convert the temperature to Celsius using the formula: Celsius = (Fahrenheit - 32) * 5/9.
   • Print the converted temperature and see if you can print the degree symbol.

Part 5: Pushing to GitHub

1. Create a GitHub Repository:
   • Log in to your GitHub account.
   • Create a new repository with a suitable name (e.g., "python_lab2").
2. Configure Git in PyCharm:
   • Open the "Git" menu in PyCharm and initialize a Git repository for your project.
   • Add your GitHub remote repository by going to "Git" -> "Manage Remotes".
3. Commit Changes:
   • Stage all changes in your PyCharm project.
   • Commit the changes with a descriptive message (e.g., "Initial commit").
4. Push to GitHub:
   • Push the committed changes to your GitHub repository using the "Push" button in PyCharm.

Submission

Submit the link to your GitHub repository containing the lab02.py file to the Canvas Lab!

Additional Notes

• Remember to use proper indentation to organize your code.
• If you encounter errors, carefully read the error messages for clues.
• Experiment with different operators and functions to explore Python's capabilities.
• Use comments to explain your code and make it easier to understand.