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--- modding:function:if [2014/12/27 04:40] – external edit 127.0.0.1
+++ modding:function:if [2017/01/25 23:31] (current) – 0xabcdef
@@ Line 1: / Line 1: @@
-[[modding:function:if]]
+[[if Talk Page|Discuss this page]]
 === if ===
-[[modding:function:if]]
+See [[http://xelerus.de/index.php?s=functions&function=13|if at Xelerus]]
 ^ Syntax | (if condition exp1 [exp2]) -> value |
 ^ Arguments | condition: anything that evaluates to Nil or non-Nil |
-^ | exp1: an expression that gets invoked if 'condition' evaluates to non-Nil (if it is 'true') |
+^ | exp1: an expression that gets evaluated if 'condition' evaluates to non-Nil (if it is 'true') |
-^ | [exp2]: an optional expression that gets invoked if 'condition' evaluates to Nil (i.e. is 'false') |
+^ | [exp2]: an optional expression that gets evaluated if 'condition' evaluates to Nil (i.e. is 'false') |
 ^ Returns | value: Whatever the expression that gets invoked returns |
 ^ Category | [[control structure functions|control structure]] |
 ^ Description | Basic branching function. Allows executing something only if a certain condition is met. A fundamental thing. |
+Unless **condition** explicitly evaluates Nil, the function considers it to be **true**. This works for any **Nil** value in any data type: **error**, **function**, **int32**, **list**, **primitive**, **string**, **struct**, **true**. Even a list containing only **Nil** values is considered **true** since the list itself is not equal to **Nil**. This behavior is equivalent to the following code:
+<code>
+(neq condition Nil)
+</code>
 === Example ===