Difference between revisions of "Basic lua: Operators"

Revision as of 00:34, 19 August 2014

Lua operators are expressions used to perform calculations or to pass arguments between different value types.

if	Query if something does or does not meet a certain condition
else	Do something else if the query condition was not met
elseif	Used to add additional if queries, if the initial query condition was not met
end	This is used to close various queries or functions; there must be the same amount of end as if unless elseif has been used

Example 1: if condition is true...

local a = true

if a then 
 print("a = true")
else
 print("a = false")
end

click to enlarge

Example 2: if condition is true... (alternative)

local a = true

if a == true then
 print("a = true")
else
 print("a = false")
end

click to enlarge

Example 3: if condition is not true do else...

local a = false

if a then
 print("a = true")
else
 print("a = false")
end

click to enlarge

Example 4: if a is 1 is elseif a is 2 do...

local a = 1

if a == 1 then
 print("a = 1")
elseif a == 2 then
 print("a = 2")
end

click to enlarge

@@ Line 40: / Line 40: @@
 |}
-Example 3: <span class="blue">if</span> condition is <span class="blue">not</span> <span style="color:green">true</span> do <span class="blue">else</span>...
+Example 3: <span class="blue">if</span> condition is not <span style="color:green">true</span> do <span class="blue">else</span>...
 {| class="tbl-alt"
 |-
@@ Line 52: / Line 52: @@
 end
 </syntaxhighlight> || width="200px" | [[File:lb_operators_003.png|thumb|right|180px|click to enlarge]]
+|}
+Example 4: <span class="blue">if</span> a is 1 is <span style="color:blue">elseif</span> a is 2 do...
+{| class="tbl-alt"
+|-
+| <syntaxhighlight>
+local a = 1
+if a == 1 then
+ print("a = 1")
+elseif a == 2 then
+ print("a = 2")
+end
+</syntaxhighlight> || width="200px" | [[File:lb_operators_004.png|thumb|right|180px|click to enlarge]]
 |}