Loops

Lua supports repeat and while loops:

myvar = 1
while myvar <= 10 do
    trace(myvar)
    myvar = myvar + 1
end

The statements between do and end are executed while myvar <= 10 is true, which means that this code prints out the numbers from 1 to 10.

You can also use break to exit a loop:

myvar = 1
while true do
    trace(myvar)
    myvar = myvar + 1
    if myvar > 10 then break end
end

This code also prints the numbers between 1 and 10.

Another way to write a loop is with the repeat statement:

myvar = 1
repeat
    trace(myvar)
    myvar = myvar + 1
until myvar > 10

For more detail see: control structures in the online reference manual and the Lua Tutorial wiki, or repeat and while in the Lua online programming book.