Basic Lua syntax

Lua has a simple syntax that is easy to both learn and read. The following is a simple script:

-- This is a sample Lua script 
-- Single line comments begin with two dashes 
--[[ 
  This is a multi-line comment. 
  Everything between the double square brackets 
    is part of the comment block. 
]] 
-- Lua is loosely typed 
var = 1         -- This is a comment 
var ="alpha"   -- Another comment 
var ="A1"      -- You get the idea... 
-- Lua makes extensive use of tables 
-- Tables are a hybrid of arrays and associative arrays 
val1 = 1 
val2 = 2 
my_table = { 
     key1 = val1, 
     key2 = val2, 
    "index 1", 
    "index 2" 
} 
--[[ 
  When the Lua script is called from FreeSWITCH 
  you have a few magic objects. The main one is 
  the 'freeswitch' object: 
  freeswitch.consoleLog("INFO","This is a log line\n") 
   
  If script is executed from dialplan (eg: there is  
  an incoming call to manage) you have the  'session'  
  object which lets you manipulate the call:...