SHELL SCRIPT FOR ELECTRICITY BILL PREPARATION

ELECTRICITY BILL PREPARATION:

echo "enter the pmr cmr"

read  pmr cmr

echo "PreviousMonthReading: $pmr"

echo  "CurrentMonthReading: $cmr"

unit=`echo $cmr - $pmr |bc`

echo " unit  :  $unit"

if [ $unit -ge 200 ]

then

amt=`echo $unit \* 2.00 | bc`

else

 if [ $unit -lt 200 -a $unit -ge 100 ]

then

amt=`echo $unit \* 1.50 | bc`

 else

   amt=`echo $unit \* .50 | bc`

fi

fi

echo " Amount  : $amt"

OUTPUT:

[@localhost ~]$ sh eletricity.sh

enter the pvr cvr

700 950

PreviousMonthReading: 700

CurrentMonthReading: 950

 unit  :  250

 Amount  : 500.00

[@localhost ~]$