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🛒 Real-Life Example – Calculating Total Order Cost

In Java, you often use multiple data types together to solve real-world problems. Here’s an example where we calculate the total cost of a purchase using integers, floats, and characters.

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🧾 Example: Shopping Cart Calculation

public class ShoppingCart {
    public static void main(String[] args) {
        // Number of items purchased
        int items = 50;

        // Cost of each item
        float costPerItem = 9.99f;

        // Currency symbol
        char currency = '$';

        // Calculate total cost
        float totalCost = items * costPerItem;

        // Print purchase details
        System.out.println("Number of items: " + items);
        System.out.println("Cost per item: " + costPerItem + currency);
        System.out.println("Total cost = " + totalCost + currency);
    }
}

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✅ Output:

Number of items: 50
Cost per item: 9.99$
Total cost = 499.5$

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💡 Key Points to Note

1. Mixing Data Types:
   We used int for the number of items, float for cost per item, and char for the currency symbol.
2. Automatic Type Conversion:
   When multiplying int and float, Java automatically promotes the result to a float.
3. Readability:
   Proper variable names like items, costPerItem, and totalCost make the program easier to understand and maintain.

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🏪 Real-World Scenarios

This approach can be applied to:

• E-commerce apps (price calculation and discounts)
• Inventory management systems
• Billing and invoice generation
• Restaurant POS (Point of Sale) software

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🔥 GoNimbus Pro Challenge

Want to level up?
Modify the program to:

• Add discount percentage
• Include tax rate
• Print the final payable amount

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