Shell Programming and Scripting

add=0
for (( i = 1 ; i <= $# ; i++ ))
do
add=`expr $i + $add`
done
#echo "sum is : $add"

$./add.sh 12 32 14 25

set -A args "$@"
add=0
for (( i = 0 ; i < ${#args[*]} ; i++ ))
do
 ((add+=args[i]))
done
echo "sum is : $add"

set 12 67 18

echo $1
12

a=1
echo $a
1

eval 'echo $'$a
12

./add.sh: line 1: set: -A: invalid option
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
sum is : 0

 
add=0
for i in $*
do
add=`expr $i + $add`
done
echo "sum is : $add"
 
sh a 12 32 14 25
sum is : 83

add=0
for i in $@
do
add=`expr $i + $add`
done
echo "sum is: $add"