Help for converting Oracle Script

Hello,

I have following Oracle script and trying to convert it for Postgres
syntax:

= = = = = = = = = = = = = = =

prompt Enter value for monyy (Month Year; Ex-mar02 indicating March
2002)

define MONYY = &monyy

spool create_new_lerg_&MONYY._accounts.lst

prompt create user acc_&MONYY.

create user acc_&MONYY.

identified by lerg

temporary tablespace temp

default tablespace prices

quota unlimited on prices;

grant normal to acc_&MONYY.;

= = = = = = = = = = = = = = =

If I enter mar02 as a input for the defined variable MONYY, then it
creates the ACC_MAR02 user in the database. Is there any equivalent for
"define" statement in Postgres? Your help is appreciated.

Thanks,

Nandu.