Lua Programming/How to Lua/operator

The lua programming language provides a series of operators that allow values and variables to be compared, evaluated or manipulated. These operators can combined together with values and variables to make expressions. The operators may take unary, dyadic or ternary form, depending on the number of operands that they utilize.

Assignment OperatorEdit

As within most other programming languages, the equals sign acts as a dyadic operator, assigning the value of the expression of the right hand operand to the variable named by the left operand.

Arithmetic operatorsEdit

  • arithmetic operators

The lua programming language provides a standard set of arithmetic operators for manipulating integer and floating point numbers.

String operatorsEdit

  • string operators

Logical operatorsEdit

  • logical operators

The logical operators are used to perform boolean operations, returning either true or false.

Bitwise operatorsEdit

  • bitwise operators

The bitwise operators are used to perform manipulation of binary numbers.

Nudge operatorsEdit

The lua programming language does not support the plusplus or dashdash increment or decrement operators. The dashdash symbol is interpreted as a comment marker in lua.

Comparative operatorsEdit

  • comparative operators

Regular expression operatorsEdit

  • regular expression operators

Numeric operatorsEdit

  • numeric operator

Comma operatorEdit

  • comma

Relationship operatorsEdit

  • relationship operators

Reference operatorsEdit

  • reference operator

Dereference operatorsEdit

  • dereference operator

Arrow operatorEdit

  • arrow operator

Length operatorEdit

In lua, the hash symbol acts as a length operator.

Combination assignment operatorsEdit

The lua programming language does not support the combination assignment operators.

Ternary operatorsEdit

  • ternary operator

Scope resolutionEdit

The percent symbol can be used as a prefix operator enabling a variable within the scope of a function to be referenced from its containing outer function.



Last modified on 11 February 2011, at 00:28