bash shell scripting problem:

Write a script to determine if a parameter supplied to the script is a palindrome or not. A palindrome is a string that reads the same forward and backward. To accomplish this, you will need to loop from 0 to the halfway point in the string and compare the character at location i to the character at location length i 1 where length is the length of the string. If, after passing halfway through, the two compared characters match in each iteration, then output the parameter and that it is a palindrome, else output the parameter and that it is not a palindrome.