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bookChallenge: Calculating Total Cost with Discounts and Tax

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Implement a shopping cart system that calculates the total order cost, applying a discount and sales tax based on predefined conditions.

  1. Use map() to get the total price of each product (there is a dedicated method getTotalPrice() in the Product class).
  2. Apply reduce() to sum up all product prices.
  3. Use a ternary operator to check if the subtotal exceeds the discount threshold (DISCOUNT_THRESHOLD) and calculate the discount. If subtotal is greater than the threshold, apply a 10% discount (DISCOUNT_PERCENTAGE); otherwise, set the discount to 0.0.
  4. Determine the discount amount by multiplying subtotal by DISCOUNT_PERCENTAGE.
  5. Calculate the pre-tax amount (preTaxAmount) by subtracting discount from subtotal.
  6. Compute the sales tax (tax) by multiplying preTaxAmount by the sales tax rate (SALES_TAX).
  7. Return the final total, calculated as preTaxAmount + tax.

Lösning

solution.java

solution.java

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Avsnitt 3. Kapitel 7
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bookChallenge: Calculating Total Cost with Discounts and Tax

Uppgift

Swipe to start coding

Implement a shopping cart system that calculates the total order cost, applying a discount and sales tax based on predefined conditions.

  1. Use map() to get the total price of each product (there is a dedicated method getTotalPrice() in the Product class).
  2. Apply reduce() to sum up all product prices.
  3. Use a ternary operator to check if the subtotal exceeds the discount threshold (DISCOUNT_THRESHOLD) and calculate the discount. If subtotal is greater than the threshold, apply a 10% discount (DISCOUNT_PERCENTAGE); otherwise, set the discount to 0.0.
  4. Determine the discount amount by multiplying subtotal by DISCOUNT_PERCENTAGE.
  5. Calculate the pre-tax amount (preTaxAmount) by subtracting discount from subtotal.
  6. Compute the sales tax (tax) by multiplying preTaxAmount by the sales tax rate (SALES_TAX).
  7. Return the final total, calculated as preTaxAmount + tax.

Lösning

solution.java

solution.java

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 7
single

single

close

Awesome!

Completion rate improved to 2.33

bookChallenge: Calculating Total Cost with Discounts and Tax

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Uppgift

Swipe to start coding

Implement a shopping cart system that calculates the total order cost, applying a discount and sales tax based on predefined conditions.

  1. Use map() to get the total price of each product (there is a dedicated method getTotalPrice() in the Product class).
  2. Apply reduce() to sum up all product prices.
  3. Use a ternary operator to check if the subtotal exceeds the discount threshold (DISCOUNT_THRESHOLD) and calculate the discount. If subtotal is greater than the threshold, apply a 10% discount (DISCOUNT_PERCENTAGE); otherwise, set the discount to 0.0.
  4. Determine the discount amount by multiplying subtotal by DISCOUNT_PERCENTAGE.
  5. Calculate the pre-tax amount (preTaxAmount) by subtracting discount from subtotal.
  6. Compute the sales tax (tax) by multiplying preTaxAmount by the sales tax rate (SALES_TAX).
  7. Return the final total, calculated as preTaxAmount + tax.

Lösning

solution.java

solution.java

Switch to desktopByt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan
Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

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