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| '''Description:'''
| | #REDIRECT [[Function]] |
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| While script syntax (see [[exec]]) is line based, functions (see [[call]], [[then]], [[do]]) are based on structured expressions and end-of-line has no special meaning, it is considered to be equivalent to space or semicolon and is therefore required even when ending line.
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| '''Note:''' Scripts can do some things that are not possible in functions.<br>
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| Scripts can wait suspended until some condition is met, they can also use goto to change execution point at any time.
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| Main language contructs used in functions are:
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| *[[if]]..[[then]]..[[else]]
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| *[[while]]..[[do]]
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| *Curled braces
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| *Multiple commands (including assigment commands) are delimited with a semicolon.
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| Result of the last expression evaluated is returned as a function result.<br>
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| This can be nothing when a function returns no value.
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| <b>Example 1</b> (max.sqf)
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| comment "Return maximum of first and second argument";<br>
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| [[private]] {"_a","_b"};<br>
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| _a = _this [[select]] 0;<br>
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| _b = _this [[select]] 1;<br>
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| if (_a>_b) [[then]] {_a} [[else]] {_b}
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| <b>Example 2</b> (infantrySafe.sqf)
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| comment "Switch all infantry units to safe mode";<br>
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| {<br>
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| [[if]] ([[vehicle]] _x == _x) [[then]]<br>
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| {<br>
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| _x [[setBehaviour]] "safe"<br>
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| }<br>
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| } [[forEach]] _this
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| Due to line-based nature of scripts it is not possible to create multiline string constants in them.<br>
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| To overcome this limitation you can store multiline in separate files and load them using [[loadFile]] or [[preprocessFile]] functions (the second uses C-like preprocessor with // or /* */ comments and #define macros).<br>
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| Recommended file extension for functions is '''.SQF''' (as opposed to '''.SQS''' used for scripts).
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| [[Category: Scripting_Topics ]] | |
