26 lines
761 B
Markdown
26 lines
761 B
Markdown
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The **iif** function implements an immediate "if" clause, returning one of two possible values.
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```lua
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result = iif(condition, trueval, falseval)
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```
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## Parameters ##
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*condition* is the logical condition to test. *trueval* is the value to return if the condition evaluates to true, *falseval* if the condition evaluates false.
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## Return Value ##
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*trueval* is the condition evaluates true, *falseval* otherwise.
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## Examples ##
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```lua
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result = iif(os.is("windows"), "is windows", "is not windows")
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```
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Note that all expressions are evaluated before the condition is checked; the following expression can not be implemented with an immediate if because it may try to concatenate a string value.
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```lua
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result = iif(x ~= nil, "x is " .. x, "x is nil")
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```
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