LESSON 164 OF 404 · PROJECTS: EVERYDAY PROGRAMS

Shopping Cart V3 - Free Shipping in Go

Practice

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

You start with:

subtotal := 75
shippingCost := 10
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 fmt.Println(result).

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

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

Use strconv.Itoa(...) to convert each number to text before concatenating it.

subtotal := 75
shippingCost := 10
freeShippingThreshold := 100

var shipping int
if subtotal >= freeShippingThreshold {
    shipping = 0
} else {
    shipping = shippingCost
}
total := subtotal + shipping
line1 := "Subtotal: $" + strconv.Itoa(subtotal)
line2 := "Shipping: $" + strconv.Itoa(shipping)
line3 := "Total: $" + strconv.Itoa(total)
result := line1 + "\n" + line2 + "\n" + line3
fmt.Println(result)

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Guided

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Shopping Cart V3 - Free Shipping in Go

Shopping Cart V3 in Go