Difference between revisions of "Basic lua: Types"

Revision as of 17:29, 25 August 2014

There are multiple lua types available, which are automatically determined by the returned value of the variable, function or table.

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Index

>

boolean	This returns a value of true or false.
function	A function usually contains a list of actions to be executed & can often be used to calculate & return values.
nil	If no data type is returned then whatever you queried is either empty or does not exist, thus it is nil.
number	This usually contains an integer (whole) or floating point (decimal) number.
string	This usually contains text or numbers wrapped in "quotation marks" or 'apostrophes'.
table	This usually consists of an array, or multiple arrays of data & data types.
threads	-
userdata	-

Example 1: boolean
local a = true print( a, type(a) )	click to enlarge

Example 2: function
function a(i) return i end print( a(7), type(a) )	click to enlarge

Example 3: nil
a = nil print( a, " type = " .. type(a) ) print( b, " type = " .. type(b) )	click to enlarge

Example 4: number
local a = 7 print(a, type(a) )	click to enlarge

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Index

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@@ Line 51: / Line 51: @@
 {| class="ts"
 |-
-! Example 3: if condition is false !!
+! Example 3: nil !!
 |-
 | <syntaxhighlight>
-local a = false
+a = nil
-if a == false then
+print( a, "  type = " .. type(a) )
- print("a = false")
+print( b, "  type = " .. type(b) )
-end
+</syntaxhighlight> || width="200px" | [[File:lb_types_003.png|thumb|right|180px|click to enlarge]]
-</syntaxhighlight> || width="200px" | [[File:lb_operators_004.png|thumb|right|180px|click to enlarge]]
+|}
+{| class="ts"
+|-
+! Example 4: number !!
+|-
+| <syntaxhighlight>
+local a = 7
+print(a, type(a) )
+</syntaxhighlight> || width="200px" | [[File:lb_types_004.png|thumb|right|180px|click to enlarge]]
 |}