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 these structures briefly. The objective of the following sections is to get you familiar with the syntax used in this language.
The if-then conditional statement evaluates an expression and executes a block of code if the expression is true. It uses the following syntax:
if status.body then --Do something end
Lua also supports an else-if conditional statement with the elseif keyword:
if status.code == 200 then --Do something elseif status.code == 301 then --Do something else end
An else statement does not need any expression to be evaluated:
if status.code == 200 then --Do something elseif status.code == 301 then --Do something else else --If no conditions are true… end