Shell programming array biggest and smallest element

# Shell programming

# Read and display array.

# Find biggest and smallest in array

echo "Enter 5 values : "

for i in 0 1 2 3 4

do

read a[$i]

done

echo "Entered values are "

for (( i=0; i<5; i++))

do

echo -e "\t ${a[$i]}"

done

big=${a[0]}

small=${a[0]}

for ((i=1;i<5;i++))

do

if [ $big -lt ${a[i]} ]

then

     big=${a[$i]}

fi

if [ $small -gt ${a[$i]} ]

then

     small=${a[$i]}

fi

done

echo "Biggest is $big"

echo "Smallest is $small"