\@if Statement

  • Article

Conditionally executes a group of statements, depending on the value of an expression.

@if (
   condition1
)
   text1
[@elif (
   condition2
)
   text2]
[@else
   text3]
@end

Arguments

  • condition1, condition2
    Optional. An expression that can be coerced into a Boolean expression.
  • text1
    Optional. Text to be parsed if condition1 is true.
  • text2
    Optional. Text to be parsed if condition1 is false and condition2 is true.
  • text3
    Optional. Text to be parsed if both condition1 and condition2 are false.

Remarks

When you write an @if statement, you do not have to place each clause on a separate line. You can use multiple @elif clauses. However, all @elif clauses must come before an @else clause.

You commonly use the @if statement to determine which text among several options should be used for text output. For example:

alert(@if (@_win32) "using Windows NT or Windows 95" @else "using Windows 3.1" @end)

Requirements

Version 3

See Also

Conditional Compilation | Conditional Compilation Variables | @cc_on Statement | @set Statement