2 400   0 + --[[ coding:UTF-8
 0 401   0 | folding structure examples ]]
 1 400   0   
 0 400   0   -- Use all the folding keywords:
 0 400   0   --    do end function if repeat until while
 2 400   0 + function first()
 0 401   0 |    -- Comment
 2 401   0 +    if op == "+" then
 0 402   0 |       r = a + b
 0 402   0 |     elseif op == "-" then
 0 402   0 |       r = a - b
 0 402   0 |     elseif op == "*" then
 0 402   0 |       r = a*b
 0 402   0 |     elseif op == "/" then
 0 402   0 |       r = a/b
 0 402   0 |     else
 0 402   0 |       error("invalid operation")
 0 402   0 |     end
 1 401   0 | 
 2 401   0 +     for i=1,10 do
 0 402   0 |       print(i)
 0 402   0 |     end
 1 401   0 | 
 2 401   0 +     while a[i] do
 0 402   0 |       print(a[i])
 0 402   0 |       i = i + 1
 0 402   0 |     end
 1 401   0 | 
 0 401   0 |     -- print the first non-empty line
 2 401   0 +     repeat
 0 402   0 |       line = io.read()
 0 402   0 |     until line ~= ""
 0 401   0 |     print(line)
 1 401   0 | 
 0 401   0 | end
 1 400   0   
 0 400   0   -- { ... } folds
 2 400   0 + markers = {
 0 401   0 |      256,
 0 401   0 |      128,
 0 401   0 | }
 0 400   0