Magnitude Between Two Parts?

Dont use print(tonumber(...).magnitude) only use print((...).magnitude).

for use tonumber you need to use: print(tonumber((...).magnitude)) not print(tonumber(...).magnitude)

and you can use workspace or game.Workspace or game:GetService("Workspace"). but do not use game.workspace

in use magnitude you need to use the parentheses: (...).magnitude Never forget that when using magnitude

Why you get error? you used tonumber(...).magnitude you need to use tonumber((...).magnitude)

Here is fixed script:

while wait(2) do
    print(tonumber((workspace.Part1.Position - workspace.Part2.Position).magnitude))
end

Hope it helped :)