Sandwich Shop

Calculate the price of a sandwich with age-based discounts

Workbook 1c, p.103 — Project name: sandwich-shop

In Plain English

Build a program for a sandwich shop. The customer picks a size and tells you their age. Young customers (17 and under) get 10% off. Senior customers (65 and older) get 20% off. Everyone else pays full price. Show the final cost.

The two sizes are: Regular ($5.45) and Large ($8.95). The user enters 1 for Regular or 2 for Large.

What a Successful Run Looks Like

Run 1 — Student Discount (10% off)

Enter sandwich size (1 for Regular, 2 for Large): 1 Enter age: 15 Cost of sandwich: $4.91

Run 2 — Senior Discount (20% off)

Enter sandwich size (1 for Regular, 2 for Large): 2 Enter age: 70 Cost of sandwich: $7.16

Run 3 — No Discount

Enter sandwich size (1 for Regular, 2 for Large): 1 Enter age: 30 Cost of sandwich: $5.45

Note: Your prompts and formatting should match the examples above. Pay attention to how the final price is displayed — it uses two decimal places with a dollar sign.

What This Exercise Practices

This exercise reinforces these concepts from Week 1:

Why this matters: This exercise combines user input, conditional logic, and formatted output in a single program. It's your first taste of building something that feels like a real application — taking input, making decisions, and showing a result.

Flow Diagram

Step 1 Ask for size 1 = Regular, 2 = Large

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Step 2 Look up base price $5.45 or $8.95

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Step 3 Ask for age Scanner input

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Step 4 Check discount ≤17: 10% / ≥65: 20%

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Step 5 Calculate price Apply discount

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Step 6 Display result Formatted output

Think about which data type to use for the price. Integers won't work here.