GTU OS Program - 10

10. Write a shell script to check entered string is palindrome or not.

Complete code

  1. echo "Enter the string to check: "
  2. read str
  3. len=`echo $str | wc -c`
  4. len=`expr $len - 1`
  5. i=1
  6. j=`expr $len / 2`
  7. while test $i -le $j
  8. do
  9.         k=`echo $str | cut -c $i`
  10.         l=`echo $str | cut -c $len`
  11.         if test $k != $l
  12.         then
  13.                 echo "String is not Palindrome"
  14.                 exit
  15.         fi
  16.         i=`expr $i + 1`
  17.         len=`expr $len - 1`
  18. done
  19. echo "String is Palindrome"

Interpreting the palindrome.sh file and executing it in terminal

  1. tkanu025@hp:~/lab_solutions$ chmod +x palindrome.sh
  2. tkanu025@hp:~/lab_solutions$ ./palindrome.sh
Output

gtu os lab manual,

os GTU Practical,

operating system Programs,

Operating system shellscript programs,

Gtu study material 3140705,

OS 3140702,

os practical list,

shell script programming,

gtu os practical,

os lab solution gtu

Comments

Post a Comment

YouTube

Popular posts from this blog

GTU OS Program - 11 Filters

Image
11. Shell programming using filters (including grep, egrep, fgrep). The programs that take plain text as standard input and transforms it into a meaningful format, and then returns it as a standard output is known as Filters. Some of the most commonly used filters are explained below: cat head tail sort uniq wc grep tac sed nl 1. cat: Displays the text of the file line by line. Syntax cat [path] Output 2. head: Displays the first n lines of the specified text files. If the number of lines is not specified then by default prints first 10 lines. Syntax head [-number_of_lines_to_print] [path] Output 3. tail: It works the same way as head, but in reverse order. It returns the lines from bottom to up Syntax tail [-number_of_lines_to_print] [path] Output 4. sort: sorts the lines alphabetically by default but we can customize the ...
Get Details

GTU OS Program - 13 Date Validator

Image
13. Write a shell script to validate the entered date. (eg. Date format is : dd-mm-yyyy). Complete code of the program echo "Date validator" #Initializing values of date, month and year dd=0 mm=0 yy=0 #initializing no of days in a month days=0 read -p "Enter day (dd) : " dd read -p "Enter Month (mm) : " mm read -p "Enter Year (yyyy) : " yy #checking for invalid month if [ $mm -le 0 -o $mm -gt 12 ] then echo "$mm is invalid month. " exit 1 fi #finding out no. of days in a month case $mm in 1 | 3 | 5 | 7 | 8 | 10 | 12) days=31 ;; 2) days=28 ;; 4 | 6 | 9 | 11) days=30 ;; *) days=-1 ;; esac #checking for leap year if [ $mm -eq 2 ] then a=`expr $yy % 4` b=`expr $yy % 100` c=`expr $yy % 400` if [ $a -eq 0 -a $b -ne 0 -o $c ...
Get Details

GTU OS Program - 8

Image
8. Write a shell script to read n numbers as command arguments and sort them in descending order. Complete code of the program read -p "Enter the number of values you want to sort " n for((i=0; i<$n; i++)) do read -p "Enter value of arr[$i]: " arr[$i] done #sorting code for((i=0; i<$n; i++)) do for((j=0; j<n-i-1; j++)) do if [ ${arr[j]} -lt ${arr[$((j+1))]} ] then #swapping temp=${arr[j]} arr[$j]=${arr[$((j+1))]} arr[$((j+1))]=$temp fi done done echo "Numbers sorted in descending order as" echo ${arr[*]} Interpreting the sort.sh file and executing it in terminal tkanu025@hp:~/lab_solutions$ chmod +x sort.sh tkanu025@hp:~/lab_solutions$ ./sort.sh Output Previous Program Next Program gtu os lab manual, os GTU Practical, opera...
Get Details