IF()
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IF() 

IF(expression?trueVal:falseVal)

Returns a value depending on a condition. If the condition is true, the value following ? is returned, otherwise the value following : is returned.

; If ${Var}=123, return 5, otherwise return 9:
exten => 123,1,Set(foo=${IF($[ ${Var} = 123]?5:9)})
[Note]

Internal help for this application in Asterisk 1.4:  

  -= Info about function 'IF' =- 

[Syntax]
IF(<expr>?[<true>][:<false>])

[Synopsis]
Conditional: Returns the data following '?' if true else the data follow
ing ':'

[Description]
Not available

diff output to internal help in Asterisk 1.2:  

- none -

See also. the section called “IFTIME()”, xthe section called “ExecIf()”, the section called “GotoIf()”, the section called “GotoIfTime()”

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