Electrical Resistance Calculator

for z in "Electrical Resistance Calc"
do
echo -e "\n\nEnter ressistor value 1: "
read R1
echo -e "Enter ressistor value 2: "
read R2
VALA=`echo ${R1}*${R2} | bc -l`
VALB=`echo ${R1}+${R2} | bc -l`
VALC=`echo "scale=2;${VALA}/${VALB}" | bc -l`
echo -e "Total resistance in series is: ${VALB}"
echo -e "Total resistance in parallel is: ${VALC}\n\n"
done