Lecture 14 — Variables & Arithmetic Review Project

Lecture 14 — Variables & Arithmetic Review Project⌗

Instructor: Laksh Budhrani

Recall⌗

Data Types⌗

Data Type	Meaning	Example
`int`	Whole number	`16`
`float`	Decimal number	`16.5`
`str`	Text	`"Hello"`
`bool`	True or False	`True`

Arithmetic Operators⌗

Operator	Meaning	Example
`+`	Addition	`10 + 5`
`-`	Subtraction	`10 - 5`
`*`	Multiplication	`10 * 5`
`/`	Division	`10 / 5`
`**`	Exponent	`2 ** 3`
`//`	Floor Division	`17 // 5`
`%`	Modulus / Remainder	`17 % 5`

Remember:

// gives the number of complete groups.
% gives the remainder.
** is used for powers.
Python follows the order of operations when evaluating expressions.

Instructions⌗

Write a Python program for each problem.

Your programs should:

Use variables to store values.
Use input() to get information from the user.
Convert input to the appropriate data type when necessary.
Use arithmetic operators to perform the calculations.
Display the final results clearly.

Do not use conditionals, loops, lists, or functions.

1. Movie Theater Revenue — 4 points⌗

Write a program that accepts the following information:

Price of an adult ticket
Number of adult tickets
Price of a child ticket
Number of child tickets

Calculate and display the total revenue from the ticket sales.

2. Car Trip Calculator — 4 points⌗

Write a program that accepts:

Distance of a trip in miles
Car’s miles per gallon (MPG)
Price of gasoline per gallon

Calculate and display:

Number of gallons of gasoline needed
Total cost of gasoline for the trip

Use:

$$\text{Gallons} = \frac{\text{Distance}}{\text{MPG}}$$$$\text{Cost} = \text{Gallons} \times \text{Price}$$

3. Number Reversal — 4 points⌗

Write a program that accepts a three-digit integer and displays the number with its digits reversed.

For example:

Input: 472
Output: 274

Use // and % to separate the digits.

Do not convert the number to a string.

4. Kinetic Energy — 4 points⌗

Write a program that accepts the mass of an object in kilograms and its velocity in meters per second.

Calculate and display the object’s kinetic energy in joules.

$$KE = \frac{1}{2}mv^2$$

5. Square and Cube Calculator — 4 points⌗

Write a program that accepts a number from the user.

Calculate and display:

The square of the number
The cube of the number
The fourth power of the number

Use the exponent operator **.

Bonus: Time Conversion — 2 points⌗

Write a program that accepts a total number of seconds.

Convert the value into:

Hours
Remaining minutes
Remaining seconds

Use // and %.

For example:

Input: 7384

Output:
Hours: 2
Minutes: 3
Seconds: 4

Submission Instructions⌗

Submit your work in Google Classroom by:

Creating a Google Doc
Pasting your code into the document
Adding a screenshot of your output
Turning in the Google Doc to the appropriate assignment