Write A Script To Perform Following String Operations Using Menu:

A.Compare two strings.
B.Join two Strings.
C.Find the length of the given Strings.
D.Find occurrence of character and word
E.Reverse the strings.

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

Output: