Flow control structures

Some classic control structures are implemented in Lua, such as the if-then conditional statements, a few different loop types, and the break and continue functions. Let’s review those structures briefly.

Conditional statements - if, then, elseif

The if-then conditional statement evaluates an expression and executes a block of code if true:

   if status.body then
     --Do something
   end

Lua also supports an else-if conditional statement with the keyword elseif:

   if status.body then 
     --Do something
   elseif
     --Do something else
   end

Note

If-then statements must end with the terminator keyword end.

Loops - while

The while loop works similarly in other programming languages:

   local x = 1
   while(x<1337)
     print x
     x = x + 1
   end

Note

While loops must end with the terminator keyword end.

Loops - repeat

The repeat loop runs the body until the set condition becomes true:

   done = false
   repeat
     --Do something
   until done

Loops - for

There are two...