Python Basics: Variables, Functions, and More
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Questions and Answers

How many lines of code need to be changed to make the calculate function return the product instead of the sum?

  • 2
  • 0
  • 1 (correct)
  • 3

    • What output is produced by the function print_water_temp_for_coffee when called with a temperature of 205?

  • Too hot.
  • Perfect temperature. (correct)
  • Temperature acceptable.
  • Too cold.

    • What will be the output of printing calc(4, 5) and calc(1, 2)?

  • 10 5
  • 10 4 (correct)
  • 11 5
  • 11 4

    • What are exceptions designed to handle in a program?

    <p>Errors or unusual cases (D)</p> Signup and view all the answers

    Which of the following is NOT a keyword related to exception handling in Python?

    <p>Throwing (B)</p> Signup and view all the answers

    Which symbol in Python is used to create a comment?

    <h1>(A)</h1> Signup and view all the answers

    What is the resulting value of the expression: 1 + int(3.5) / 2?

    <p>2.5 (D)</p> Signup and view all the answers

    What is the data type used for floating point numbers in Python?

    <p>Float (D)</p> Signup and view all the answers

    What does the expression 'key != 'q'' evaluate to when a user types 'q'?

    <p>0 (B), (C)</p> Signup and view all the answers

    Which of the following correctly removes the value 'Google' from a set named companies?

    <p>companies.remove('Google') (A)</p> Signup and view all the answers

    If grade is assigned the value 75, which letter will be output based on the given logic block?

    <p>B (A)</p> Signup and view all the answers

    What is the term for a word that is part of the Python language and cannot be used as a variable name?

    <p>Keyword (D)</p> Signup and view all the answers

    What is the value of x after executing the statement 'x = -2'?

    <p>-2 (B)</p> Signup and view all the answers

    Flashcards

    Variables in programming

    Symbols used to represent data values in a program.

    Python comment symbol

    Used to add notes to code that are ignored by the interpreter.

    int() function

    Transforms a string into an integer.

    Runtime error

    An error that occurs during program execution.

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    IDE

    An integrated development environment used to create and run programs.

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    Remainder of 15 / 3

    The result of the modulo (%) operation applied to 15 and 3.

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    Print statement for "I won't quit!"

    Displays the specified string to the console.

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    Float Data Type

    Represents numbers with decimal points..

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    Function Return Value Change

    Changing a function to return a product instead of a sum requires a single code alteration.

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    Conditional Temperature Check

    Checks if a given temperature is within the ideal range for coffee, printing appropriate messages.

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    Function Return Values

    A function's return value is the result produced by the function after execution.

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    Function Call Return Point

    After a function completes its tasks, the program execution resumes from the line immediately following the function call.

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    Exception Handling

    Exceptional cases or errors during program execution are managed by special mechanisms.

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    Study Notes

    Variables and Comments

    • Variables are symbols representing data
    • The symbol '#' is used for comments in Python
    • int() converts strings to integers

    Errors and Functions

    • Dividing by zero is a runtime error
    • IDEs are used for program development including source code writing
    • int() converts strings to integers

    Data Types

    • float is the data type for floating-point numbers
    • -2 is the result of x after the code provided.
    • keyword can't be used as a variable name in Python
    • print('I won\'t quit!') displays the literal string I won't quit!
    • print(f'{"Tokyo":s} had {9.273000:f} million people in {2015:d}') displays Tokyo had 9.273000 million people in 2015

    Set Operations

    • companies.remove('Google') removes 'Google' from the companies set.

    Lists and Operations

    • names_list + digits_list concatenates the two lists.
    • The result of names_list is ['one', 'two', 'three', '1', '2', '3']

    String Indexing

    • text_line[6] extracts the character at index 6 from the string text_line.
    • The result is 'S'.

    Conditional Logic

    • Logic to determine a user's input for continuing or quitting (key != 'q')

    Conditional Statements

    • Statements for determining the Output given different x values
    • -x values from 21 to 40 correspond to "Medium" output

    Conditional Output

    • A grade of 75 results in "C" being printed (as per the given conditional logic)

    Operator Precedence

    • The multiplication (*) operation is evaluated before addition (+) and subtraction (-) in the expression x + y < y - z * 2
    • Looping and values- Loops can work with negative values as well.

    Looping

    • Iteration describes each cycle of a loop
    • Infinite loops are generally not desirable and are not favorable

    Function Execution and Return

    • After a function's last statement, the program returns to the line following the function call
    • calc_square_area(val) returns the calculated area value

    Exceptions

    • Exceptions handle errors in programs
    • EOFError, ZeroDivisionError, and ValueError are examples of common exceptions in Python
    • The programmer is able to define their own exception types.

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    Description

    This quiz covers fundamental concepts of Python programming, including variables, comments, data types, and print statements. Test your knowledge on how to handle errors, set operations, and list manipulations within Python. Perfect for beginners looking to solidify their understanding of the basics.

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