LESSON 164 OF 414 · PROJECTS: EVERYDAY PROGRAMS

Shopping Cart V3 - Free Shipping in Scala

Practice

Use an if/else to decide whether to charge shipping based on a free-shipping threshold.

You start with:

        val subtotal = 75
        val shippingCost = 10
        val freeShippingThreshold = 100

Build:

Subtotal: $75
Shipping: $10
Total: $85

Rules:

If subtotal >= freeShippingThreshold, set shipping to 0; otherwise set it to shippingCost.
total = subtotal + shipping.
Always include all three lines (Subtotal, Shipping, Total). When shipping is free, the line shows $0: for a subtotal of 120 the lines would be Subtotal: $120, Shipping: $0, Total: $120.
Join the three lines with a newline "\n" into one string result, then print it with println(result).

Decide shipping in an if/else first, then build the three lines.

Declare var shipping = 0 before the if, so it is still visible after the if/else, then assign it in both branches.

In Scala "Total: $" + total converts the number to text for you.

        val subtotal = 75
        val shippingCost = 10
        val freeShippingThreshold = 100

        var shipping = 0
        if (subtotal >= freeShippingThreshold) {
            shipping = 0
        } else {
            shipping = shippingCost
        }
        val total = subtotal + shipping
        val line1 = "Subtotal: $" + subtotal
        val line2 = "Shipping: $" + shipping
        val line3 = "Total: $" + total
        val result = line1 + "\n" + line2 + "\n" + line3
        println(result)

STEP 1 OF 11

Guided

Ctrl + Enter to check

Shopping Cart V3 - Free Shipping in Scala

Shopping Cart V3 in Scala