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    1. #
    2. #Write A Script To Perform Following String Operations Using Menu: 
    3. #    1)COMPARE TWO STRINGS. 
    4. #	2)JOIN TWO STRINGS. 
    5. #	3)FIND THE LENGTH OF A GIVEN STRING. 
    6. #	4)OCCURRENCE OF CHARACTER AND WORDS 
    7. #	5)REVERSE THE STRING.         
    8. #
    9. clear
    10. echo "==================== AVAILABLE CHOICES ========================="
    11. echo "1. Compare two strings"
    12. echo "2. Join two strings"
    13. echo "3. Find length of a given string"
    14. echo "4. Occurance of character and word in a string"
    15. echo "5. Reverse the string"
    16. echo "E. Exit"
    17. echo "================================================================"
    18. echo "Enter your choice :"
    19. read choice
    20. while [ "$choice" != "e" -o "$choice" != "E" ]
    21. do
    22. 	case $choice in
    23. 	"1")
    24. 		echo -n "Enter first string :"	
    25. 		read firststr
    26. 		echo -n "Enter second string :"	
    27. 		read secondstr
    28. 		#if [ "$firststr" = "$secondstr" ] #FOR CASE SENSITIVE CHECK
    29. 		if [ `echo $firststr | grep -ci $secondstr` -gt 0 ] #FOR CASE INSENSITIVE CHECK
    30. 		then
    31. 			echo "Both strings are same"
    32. 		else
    33. 			echo "Both strings are different"
    34. 		fi
    35. 	;;	
    36. 	"2")
    37. 		echo -n "Enter first string :"	
    38. 		read firststr
    39. 		echo -n "Enter second string :"	
    40. 		read secondstr
    41. 		echo "Joining of two string is : $firststr$secondstr"
    42. 	;;
    43. 	"3")
    44. 		echo -n "Enter any string :"	
    45. 		read string
    46. 		length=$(echo $string | wc -c)
    47. 		length=$(expr $length - 1)
    48. 		echo "Length of string is "$length
    49. 	;;
    50. 	"4")
    51. 		echo "Enter any string :"	
    52. 		string=$(cat) #ctrl + d to terminate
    53. 		characters=$(echo $string | wc -c)
    54. 		lines=$(echo "$string" | wc -l)
    55. 		echo "No of characters : $characters"
    56. 		echo "No of lines : $lines"
    57.  
    58. 	;;
    59. 	"5")
    60. 		echo "Enter any string :"	
    61. 		read string
    62. 		#echo $(echo $string | rev ) 1-solution
    63. 		length=$(echo $string | wc -c)
    64. 		length=$(expr $length - 1)
    65. 		i=$length
    66. 		s=""
    67. 		while [ $i -gt 0 ]
    68. 		do
    69. 			 s=$s$(echo $string | cut -c$i)
    70. 			i=$(expr $i - 1)
    71. 		done
    72. 		echo "Reverse of the string is $s"
    73. 	;;
    74. 	[eE])
    75. 		exit;
    76. 	;;
    77. 	*)
    78. 		echo "Invalid choice"
    79. 	;;
    80. 	esac
    81. 	read temp
    82. 	clear
    83. 	echo "==================== AVAILABLE CHOICES ========================="
    84. 	echo "1. Compare two strings"
    85. 	echo "2. Join two strings"o
    86. 	echo "3. Find length of a given string"
    87. 	echo "4. Occurance of character and word in a string"
    88. 	echo "5. Reverse the string"
    89. 	echo "E. Exit"
    90. 	echo "================================================================"
    91. 	echo "Enter your choice :"
    92. 	read choice
    93. done