Batch file to backup PostgreSQL DB

CodeMonk#pg_backup.bat

@echo off

goto comment
 Author: Code Monk
 Description: This file use to backup the database using PostgreSQL backup utility "pg_dump".
              Backup parameters should be setup before executing this file
 
 File Format flags : 	
				c = Custom
				t = Tar
				p = Plain SQL

  Follow links below to apply more flags to "pg_dump" :
	http://www.postgresql.org/docs/8.4/static/app-pgdump.html
    https://www.commandprompt.com/ppbook/x17860
	http://www.brownfort.com/2014/10/backup-restore-postgresql/
	
	Table Excluding Flags:
	-T table_name
	
:comment


REM "Set following backup parameters to take backup"
SET PGPASSWORD=monk_5578
SET db_name=monk_db
SET file_format=c
SET host_name=localhost
SET user_name=postgres
SET pg_dump_path="C:\Program Files (x86)\PostgreSQL\9.3\bin\pg_dump.exe"  
SET target_backup_path=C:\Monk\
SET other_pg_dump_flags=--blobs --verbose -c 

REM Fetch Current System Date and set month,day and year variables
for /f "tokens=1-3 delims=- " %%i in ("%date%") do (
	set month=%%j
	set day=%%i
	set year=%%k
)
for /f "tokens=1-3 delims=: " %%i in ("%time%") do (
	set hour=%%i
	set min=%%j
	set sec=%%k
)


REM Creating string for backup file name
for /f "delims=" %%i in ('dir "%target_backup_path%" /b/a-d ^| find /v /c "::"') do set count=%%i
set /a count=%count%+1 
set datestr=backup_%year%_%month%_%day%_%hour%_%min%

REM Backup File name
set BACKUP_FILE=%db_name%_%datestr%.backup

REM :> Executing command to backup database
%pg_dump_path% --host=%host_name% -U %user_name% --format=%file_format%  %other_pg_dump_flags% -f %target_backup_path%%BACKUP_FILE%  %db_name% 

when I run the script, it asking for password, is there any way to set passord in batch file and use that without asking for password

Thanks !!