Give a function one input

v3 · Activity 3 of 12 · parameters · 3 min Runs here

Chapter outline

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One step at a time

A parameter is an input name in a function definition. Calling addBonus(4) gives points the value 4. The function returns that input plus 2.

Your task

Change the two calls so addBonus displays 5 and then 9. Keep the provided calculation: each input receives 2 extra points.

Expected output

5
9

Lines must stay in order. Spelling, capitalization and spaces inside a message matter.

See another example

local function addBonus(points)
    return points + 2
end
print(addBonus(8))

The argument 8 becomes points. The return gives 10 back to print.

Syntax in this activity

New syntax: (points), addBonus(4)

Earlier ideas used here

functions
return-values
addition
printing

Explain more

Different calls can give the same parameter different values. The name points is local to each call. Returning sends the calculated value back to the caller; print then displays it.

Explain this code

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

  addBonuspoints
     points  2

addBonus1
addBonus2

Choose a highlighted part to see what it means.

Free experiment

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

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local function addBonus(points)
    return points + 2
end
print(addBonus(8))

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

Experiment Output

Your output will appear here.

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Code

Luau

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local function addBonus(points)
    return points + 2
end
print(addBonus(1))
print(addBonus(2))

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

Your output will appear here.

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Your task

Change the two calls so addBonus displays 5 and then 9. Keep the provided calculation: each input receives 2 extra points.

Expected output

5
9

Lines must stay in order. Spelling, capitalization and spaces inside a message matter.

See another example

local function addBonus(points)
    return points + 2
end
print(addBonus(8))

The argument 8 becomes points. The return gives 10 back to print.

Syntax in this activity

New syntax: (points), addBonus(4)

Earlier ideas used here

functions
return-values
addition
printing

Explain more

Different calls can give the same parameter different values. The name points is local to each call. Returning sends the calculated value back to the caller; print then displays it.

Explain this code

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

  addBonuspoints
     points  2

addBonus1
addBonus2

Choose a highlighted part to see what it means.

Free experiment

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

Font size Plain text

local function addBonus(points)
    return points + 2
end
print(addBonus(8))

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

Experiment Output

Your output will appear here.