3.3.7 – Local Declarations Local variables can be declared anywhere inside a block. The declaration can include an initial assignment: stat ::= local

3.3.3 – Assignment Lua allows multiple assignments. Therefore, the syntax for assignment defines a list of variables on the left side and a list of expressions on the right side. The elements

3.4.1 – Arithmetic Operators Lua supports the following arithmetic operators: +: addition -: subtraction *:

3.4.9 – Table Constructors Table constructors are expressions that create tables. Every time a constructor is evaluated, a new table is created. A constructor can be used to create an empty

3.3.2 – Chunks The unit of compilation of Lua is called a chunk. Syntactically, a chunk is simply a block: chunk ::= block Lua

3.4.8 – Precedence Operator precedence in Lua follows the table below, from lower to higher priority: or and < > <= >=

3.4.3 – Coercions and Conversions Lua provides some automatic conversions between some types and representations at run time. Bitwise operators always convert float operands to integers. Exponentiation

3.4.11 – Function Definitions The syntax for function definition is functiondef ::= function funcbody funcbody ::= ‘(’ [parlist] ‘)’ block end

3.4.7 – The Length Operator The length operator is denoted by the unary prefix operator #. The length of a string is its number of bytes (that is, the usual meaning of

3.4.4 – Relational Operators Lua supports the following relational operators: ==: equality ~=: inequality <: