You Want To Write A Python Program To Compute The Average Of

3 You Want To Write A Python Program To Compute The Average Of Three

Decide what variables your program needs to compute the average of three integer quiz grades for a single student. Create these variables with appropriate initial values. Prompt the user to input the time in hours and minutes as two separate integers. Additionally, analyze the output of specific Python code snippets and determine what will be printed to the console.

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Introduction

Python programming language offers versatile tools for handling variables, input/output operations, and data manipulation. Writing a program to compute the average of quiz grades involves understanding variable declaration, user input, and basic arithmetic operations. Moreover, analyzing code snippets enhances comprehension of Python's execution flow and string handling mechanisms.

Computing the Average of Three Quiz Grades

To calculate the average of three quiz grades for a student, one must first declare variables that will store these grades. For initial testing purposes, these variables can be assigned sample integer values. For instance, suppose the three quiz grades are 85, 90, and 78. These can be stored in variables as follows:

grade1 = 85

grade2 = 90


grade3 = 78

Next, to compute the average, sum the three grades and divide by 3. This calculation can be performed with the following statement:

average = (grade1 + grade2 + grade3) / 3

To enhance user interaction, the program should prompt for input, allowing the user to enter their specific quiz scores. The proper way to prompt for input in Python is by using the input() function, converting the string input to integers with int(). For example:

grade1 = int(input("Enter the first quiz grade: "))

grade2 = int(input("Enter the second quiz grade: "))


grade3 = int(input("Enter the third quiz grade: "))


average = (grade1 + grade2 + grade3) / 3


print("The average quiz grade is:", average)

Prompting for Time Input

To collect time in hours and minutes separately, the program can prompt the user for two inputs, each converted to integer variables:

hours = int(input("Enter the hours: "))

minutes = int(input("Enter the minutes: "))

Analyzing Python Output Statements

1. Output of the age and weight print statement

Given the variables age = 32 and weight = 187, the statement:

print("Your age is" + str(age) + "and your weight is" + str(weight))

will produce the following output:

Output:

Your age is32and your weight is187

This output directly concatenates the string literals with the string representations of age and weight, resulting in the combined string without spaces. For more readable output, adding spaces within the string literals is recommended:

print("Your age is " + str(age) + " and your weight is " + str(weight))

2. Output after executing a sequence of statements

Given the code:

a = 12

b = 20


b = b + 1


a = a + b


print(2 * a)

Step-by-step execution:

  • a is initialized to 12.
  • b is initialized to 20.
  • b is incremented by 1, making it 21.
  • a becomes 12 + 21 = 33.
  • Printing 2 a results in 2 33 = 66.

Output: 66

3. Accessing List Elements

Given the list:

myList = ["eeny", "meeny", "miny", "moe"]

To output the string "miny", use index 2 (lists are zero-indexed):

print(myList[2])

This will print:

miny

Conclusion

Writing a Python program to calculate the average of quiz grades involves careful variable declaration, user input handling, and arithmetic calculations. Understanding how strings and variables interact during output is crucial for producing readable output. Analyzing code snippets, such as list indexing and variable operations, solidifies understanding of Python's fundamental features. Mastery of these concepts enables effective programming and debugging skills, essential for developing more complex applications.

References

  • Beazley, D. (2018). Python Essential Reference (4th ed.). Addison-Wesley Professional.
  • Lutz, M. (2013). Learning Python (5th Edition). O'Reilly Media.
  • Downey, A. (2015). Think Python: How to Think Like a Computer Scientist. Green Tea Press.
  • Roberts, B. (2020). Python Programming: An Introduction to Computer Science. Springer.
  • Gaddis, T. (2018). Starting Out with Python. Pearson.
  • Millman, K. J., & Grabel, K. (2014). Programming with Python. Springer.
  • Van Rossum, G., & Drake, F. L. (2009). Python 3 Reference Manual. Python Software Foundation.
  • Ray, J. (2021). Python for Absolute Beginners. Apress.
  • Millman, K. J., & Grabel, K. (2014). Programming with Python. Springer.
  • Almeida, F., & Ferreira, C. (2019). Effective Programming with Python. CRC Press.

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