Write a C program that checks whether a given string is Palindrome or not.

Problem:    Write a function that checks whether a given string is Palindrome or not.Use this function to find whether the string entered by user is Palindrome or not.

What is palindrome: A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward, such as madam, racecar. There are also numeric palindromes, including date/time stamps using short digits 11/11/11 11:11 and long digits 02/02/2020.Source

• Source Code:

/*******************************************/

1. #include<stdio.h>
2. #include<conio.h>
3. int main()
4. {
5.                //variables declaration.
6.                long int num,copy,sum=0;
7.                int digit;
8.               
9.                //Input the number.
10.                printf("\n Enter the number:");
11.                scanf("%d",&num);
12.                copy=num;
13.               
14.                //calculate the palindrome number.
15.                while(num>0)
16.                {
17.                               digit=num%10;
18.                               sum=sum*10+digit;
19.                               num=num/10;
20.                }
21.                printf("\n The reverse number is: %d",sum);
22.                if (copy==sum)\
23.               
24.                //display the palindrome number.
25.         printf("\n Number is palindrome.");
26.     else
27.         printf("\n Number is not palindrome.");
28.     getch();
29. }

• Output:

 1.        Enter the number:25752

            The reverse number  is: 25752

            Number is palindrome. 

 2.       Enter the number:152

           The reverse number is: 251

           Number is not palindrome.