Local variables and naming conventions in Ruby - Mini Project: Build & Apply

Local variables and naming conventions

📖 Scenario: You are helping a small bakery keep track of daily sales. You will use local variables with clear names to store and calculate the total number of bread loaves sold.

🎯 Goal: Create local variables with proper names to store daily sales numbers, add them up, and print the total loaves sold.

📋 What You'll Learn

Create local variables with lowercase letters and underscores

Use descriptive variable names for daily sales

Add the daily sales variables to get the total

Print the total number of loaves sold

💡 Why This Matters

🌍 Real World

Local variables are used everywhere in programming to store temporary information like daily sales, user input, or calculation results.

💼 Career

Clear variable naming and using local variables properly is a fundamental skill for any programmer, making your code easier to maintain and collaborate on.

1

Create local variables for daily sales

Create three local variables called monday_sales, tuesday_sales, and wednesday_sales with the values 20, 25, and 30 respectively.

Ruby

# Create local variables monday_sales, tuesday_sales, wednesday_sales with values 20, 25, 30
# Your code here

Need a hint?

Use lowercase letters and underscores for variable names. Assign the exact numbers given.

2

Create a variable for total sales

Create a local variable called total_sales and set it to the sum of monday_sales, tuesday_sales, and wednesday_sales.

Ruby

monday_sales = 20
tuesday_sales = 25
wednesday_sales = 30
# Create total_sales as the sum of monday_sales, tuesday_sales, and wednesday_sales
# Your code here

Need a hint?

Add the three daily sales variables and store the result in total_sales.

3

Print the total sales

Use puts to print the value of total_sales.

Ruby

monday_sales = 20
tuesday_sales = 25
wednesday_sales = 30
total_sales = monday_sales + tuesday_sales + wednesday_sales
# Print total_sales
# Your code here

Need a hint?

Use puts followed by the variable name to display the total.

4

Run the program and see the output

Run the program to display the total number of bread loaves sold over the three days.

Ruby

monday_sales = 20
tuesday_sales = 25
wednesday_sales = 30
total_sales = monday_sales + tuesday_sales + wednesday_sales
puts total_sales
# Run the program

Need a hint?

The output should be the sum of 20, 25, and 30, which is 75.