unused_variable

This lint rule checks for instances of unused locals. Unlike Luau's built-in linter, this also flags instances of unused function parameters and loop variables. To silence instances of deliberately unused variables, lint warnings can be silenced by prefixing the variable name with _.

Why this is discouraged

Unused variables can result in less readable code in the best case, and worse performance in the worst case.

Example violations

unused_variable will warn on the following:

local function _(x)
	return nil
end

You should instead consider:

local function _()
    return nil
end

Or simply silence the warning:

local function _(_x)
	return nil
end