Reuse a round reward calculation

v6 · Activity 6 of 14 · functions · parameters · return-values · 9 min Runs here

Chapter outline

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Mini-mission

Build a reward calculation that can be reused for different rounds. Each collected star earns 3 points, then a completion bonus adds 2. Return the total so callers can use it. Zero stars still earns the bonus.

Run code tests the same solution with the reviewed inputs shown below. The Learning simulation displays the actual returned values, including incorrect results. It does not test Roblox physics, networking or persistent game data.

Your task

Define reward(stars) to return stars * 3 + 2. Keep the final return reward so the checker can call it with several inputs.

Interface: reward(stars: number) returns a number. The checker calls the returned function with each test input.

Input	Expected
No stars`0`	`2`
One star`1`	`5`
Four stars`4`	`14`

Syntax in this activity

New syntax: parameters, arguments, *, - (optional practice), multiplication before subtraction (optional practice)

Earlier ideas used here

functions
return-values
local-variables
numbers

What this exercise checks

Actual returned results for every test input · the stated behavior · extra output allowed.

Successful execution is required. A compile error, runtime error or execution limit never completes this task.

Whitespace, matching single or double quotes, and different variable names are allowed. Output-only tasks accept any valid Luau solution meeting the displayed result and value types. Construct tasks use the stated straight-line form.

Explain this code

Select a word or symbol in this authored example. Your editor draft stays unchanged.

  scorerounds
     rounds    

score

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Free experiment

This is a private experiment copy. It does not replace your answer or complete the activity.

These inputs apply when your scratchpad returns the function described by the activity interface.

Test different inputs

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local function score(rounds)
    return rounds * 2 + 1
end
print(score(3))

local function score(rounds)
    return rounds * 2 + 1
end
print(score(3))

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Experiment Output

Your output will appear here.

Reset starter

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Code

Luau

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-- Define reward(stars) here.

return reward

-- Define reward(stars) here.

return reward

Luau keyword highlighting · Ctrl/⌘ + Enter: Run · Esc: leave editorTab inserts indentation

Your output will appear here.

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