ACTION: return the address of a variable
USE: reading writing data of variables and arrays of variables, by reference
int a=42
print @a 'address of a
int *b 'indirect (pointer) variable
@b=@a   'coupled by address
print b '42

REMARKS: Unlike C, pointer resolution is handled implictly. So the @ operator is required
for manipulating pointers. It is similar to the & operator in C.

RELATED: * ? strptr addr