Write A Script To Perform Following String Operations Using Menu: COMPARE TWO STRINGS. JOIN TWO STRINGS. FIND THE LENGTH OF A GIVEN STRING. OCCURRENCE OF CHARACTER AND WORDS E. REVERSE THE STRING.

clear
echo "STRING MANIPULATION PROGRAM"
echo "1. COMPARE STRING"
echo "2. JOINT TWO STRING"
echo "3. LENGTH OF STRING"
echo "4. OCCOURANCE OF CHARACTER"
echo "5. OCCOURANCE OF WORD"
echo "6. REVERSE STRING"
echo "ENTER CHOICE:"
read ch
case $ch in
1)
echo "ENTER FIRST STRING:"
read str1
echo "ENTER SECOND STRING:"
read str2

len1=`echo $str1 | wc -c`
len2=`echo $str2 | wc -c`

if [ $len1 -eq $len2 ];then
echo "BOTH STRINGS ARE OF SAME LENGTH"
elif [ $len1 -gt $len2 ];then
echo "$str1 is greater than $str2"
else
echo "$str2 is greater than $str1"
fi

;;
2)
echo "ENTER FIRST STRING:"
read str1
echo "ENTER SECOND STRING:"
read str2
str1="$str1$str2"
echo "COMBINED STRING : $str1"
;;
3)
echo "ENTER STRING:"
read str
len=`echo $str | wc -c`
echo "Length of string is $len"
;;
4)
echo "ENTER STRING:"
read str
echo "ENTER character of word to search:"
read search
len=`echo $str | wc -c`
i=1
while [ $i -lt $len ]
do
ch=`echo $str | cut -c $i`
echo $ch
i=`expr $i + 1`
done
;;
5)
echo "NOT THERE"
;;
6)
echo "ENTER STRING:"
read str
echo "REVERSE STRING IS : "`echo $str | rev`
;;
*)
echo "ENTER PROPER CHOICE"
echo "NOT THERE"
;;
esac