Inside Macintosh: AppleScript Language Guide / Part 2 - AppleScript Language Reference

Chapter 7 - Control Statements / If Statements

If (Simple Statement)

A simple If statement contains one Boolean expression and a statement to be executed if the value of the Boolean expression is true.

SYNTAX

if Boolean then statement 

where

Boolean is an expression whose value is true or false.

statement is any AppleScript statement.

EXAMPLES

In the following If statement

if result > 3 then display dialog "The result is " & ÿ   result as string

the Display Dialog command is executed only if the value of the Boolean expression result > 3 is true.