Check whether a string is palindrome or not in PL/SQL
Last Updated :
12 Jul, 2018
Prerequisite – PL/SQL introduction
In PL/SQL code groups of commands are arranged within a block. A block group related declarations or statements. In declare part, we declare variables and between begin and end part, we perform the operations.
Given a string and the task is to find whether it is Palindrome or not.
Examples:
Input: str = geeksskeeg
Output: geeksskeeg is palindrome
Input: str = geeks
Output: geeks is not palindrome
Approach is to take the string, reverse it and check whether the reversed string is equal to the original string or not. If it is equal, then it will be palindrome otherwise not.
Below is the required implementation:
DECLARE
s VARCHAR2(10) := 'abccba' ;
l VARCHAR2(20);
t VARCHAR2(10);
BEGIN
FOR i IN REVERSE 1..Length(s) LOOP
l := Substr(s, i, 1);
t := t
|| ''
||l;
END LOOP;
IF t = s THEN
dbms_output.Put_line(t
|| ''
|| ' is palindrome' );
ELSE
dbms_output.Put_line(t
|| ''
|| ' is not palindrome' );
END IF;
END ;
|
Output:
abccba is palindrome
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