Luaのフロー制御文if elseの使用例

if(boolean expression)
then
 --[ statement executed when boolean expression is true --]
end

i = 0 ; -- Define a variable i and initialize it to 0
if i < 5 --if i is less than 5
then
 while(true) -- do a loop plus 1 at this point
 do
  i = i+1 ;
  print("i:",i);
  if i == 5 --if i is equal to 5 
  then
  break ; --Exit the loop
  end
 end
end

if(boolean expression)
then
 --[ execute the block when the boolean expression is true --]
else
 --[ Execute the block when the Boolean expression is false --]
end

num = 3 ;
if num < 0
then 
 print("num is smaller than 0! ");
else
 print("num is greater than 0! ");
end