Shell Programming and Scripting

#!/bin/bash/
Var1=$(date +%j)
Var2=$1

let result=$Var1+$Var2
echo $Var1 plus $Var2 equals $result

typeset -i Var1 Var2

n12:/home/vbe/wks/test/arithmetics $ bash
n12:/home/vbe/wks/test/arithmetics $ let A=$(date +%j)
n12:/home/vbe/wks/test/arithmetics $ echo $A
8
n12:/home/vbe/wks/test/arithmetics $ exit
exit
n12:/home/vbe/wks/test/arithmetics $ echo $0
/usr/dt/bin/dtksh
n12:/home/vbe/wks/test/arithmetics $ let A=$(date +%j)
n12:/home/vbe/wks/test/arithmetics $ echo $A              
10

n12:/home/vbe/wks/test/arithmetics $ bash
n12:/home/vbe/wks/test/arithmetics $ date +%j
010
n12:/home/vbe/wks/test/arithmetics $ let A=$(date +%j)
n12:/home/vbe/wks/test/arithmetics $ echo $A
8
n12:/home/vbe/wks/test/arithmetics $  A=$(date +%j)
n12:/home/vbe/wks/test/arithmetics $ echo $A
010
n12:/home/vbe/wks/test/arithmetics $ let B=$A
n12:/home/vbe/wks/test/arithmetics $ echo $B
8
 
Only workaround for now ( I have other things to do...) I can think of is:
n12:/home/vbe/wks/test/arithmetics $ echo "$A + $B" |bc
12

typeset -i Var1=$(date +%j)

Var1=`date +%j`
Var1="${Var1##*0}"

Var1=${Var1#"${Var1%%[!0]*}"}