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 Allows conditional execution based upon the evaluation of a boolean
 expression.
 
 Syntax 1: Block Form
    IF condition-1 THEN
         [statementblock-1]
    [ELSEIF condition-2 THEN
         [statementblock-2]]...
    [ELSE
         [statementblock-n]]
    END IF
 
 Syntax 2: Single-Line Form
    IF condition THEN statements [ELSE statements]
 
    ■ condition         Any expression that can be evaluated as True
                        (nonzero) or False (zero)
 
    ■ statementblock-1  Any number of statements on any number of lines,
      ...               separated by colons (:)
      statementblock-n
 
 See Also
    ◄IF TYPEOF Statement►              ◄Loops and Decision Structures►
    ◄SELECT CASE Statement►