Since version 1.1

Used within an expression, the @ operator returns the memory address of the variable or label that it is prepended to, as an integer.

Example:

rem define a new variable
let x=1
	
rem retrieve information about the variable
print "the value of x is ", x
print "the address of x is ", @x

A more typical usage of the @ operator is to resolve the address of a label. Please refer to this example for demonstration.