Shell Script of Bubble sort

sorting.sh

echo "Enter number of elements"
read k
echo "enter array elements"
for ((i=0; i<k; i++))
do
	read a[$i]
done

for ((i=0; i<k; i++))
do
	for((j=$i; j<k; j++))
	do
		if [ ${a[$i]} -gt ${a[$j]} ]
		then
			temp=${a[$i]}
			a[$i]=${a[$j]}
			a[$j]=$temp
		fi
	done
done

echo "Array after sorting: "
for ((i=0; i<k; i++))
do
	echo ${a[$i]}
done