Inside Macintosh: AppleScript Language Guide / Part 3 - Appendixes

Appendix A - The Language at a Glance

Operators

Table A-4 summarizes the operators in the AppleScript English language dialect. The first column lists the operators. The second column shows
the syntax for using the operators in expressions. The placeholders in the
syntax descriptions correspond to AppleScript value classes, which are described briefly in the last section of this appendix, and in more detail in
Chapter 3, "Values."

Synonyms are listed in groups. The table shows the syntax for the first operator, but operators that are synonyms follow the same syntax rules.

Operators

Operator	Syntax
Arithmetic operators
*	number * number
+	number + number date + number
-	number - number date - number date - date
÷ /	number ( ÷ | / ) number
^	number ^ number
div	number div number
mod	number mod number
Logical operators
and	Boolean and Boolean
not	not Boolean
or	Boolean or Boolean
Containment operators
start[s] with begin[s] with	list starts with list string starts with string
end[s] with	list ends with list string ends with string
contains	list contains list record contains record string contains string
does not contain doesn't contain	list does not contain list record does not contain record string does not contain string
is in is contained by	list is in list record is in record string is in string
is not in is not contained by isn't contained by	list is not in list record is not in record string is not in string
Comparison operators (equality and inequality)
= equal equals equal to is is equal to	expression = expression
≠ does not equal doesn't equal is not is not equal [to] isn't isn't equal [to]	expression ≠ expression
Comparison operators (precedence)
< comes before is less than is not greater than or equal [to] isn't greater than or equal [to] less than	date < date integer < integer real < real string < string
> comes after greater than is greater than is not less than or equal [to] isn't less than or equal [to]	date > date integer > integer real > real string > string
≤ <= does not come after doesn't come after is less than or equal [to] is not greater than isn't greater than less than or equal [to]	date ≤ date integer ≤ integer real ≤ real string ≤ string
≥ >= does not come before doesn't come before greater than or equal [to] is greater than or equal [to] is not less than isn't less than	date ≥ date integer ≥ integer real ≥ real string ≥ string
Miscellaneous operators
&	expression & expression
as	expression as className
a reference to	[a] ( ref [to] | reference to ) ÿ reference