C Program to Check whether a given String is Palindrome or not using Recursion

The following C program, with recursion, determines whether the entered string is a palindrome or not. A palindrome is a word, phrase or sentence that reads the same backward or forward.

Here is the source code of the C program to display a linked list in reverse. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C Program to Check whether a given String is Palindrome or not 
  3.  * using Recursion
  4.  */
  5. #include <stdio.h>
  6. #include <string.h>
  7.  
  8. void check(char [], int);
  9.  
  10. int main()
  11. {
  12.     char word[15];
  13.  
  14.     printf("Enter a word to check if it is a palindrome\n");
  15.     scanf("%s", word);
  16.     check(word, 0);
  17.  
  18.     return 0;
  19. }
  20.  
  21. void check(char word[], int index)
  22. {
  23.     int len = strlen(word) - (index + 1);
  24.     if (word[index] == word[len])
  25.     {
  26.         if (index + 1 == len || index == len)
  27.         {
  28.             printf("The entered word is a palindrome\n");
  29.             return;
  30.         }
  31.         check(word, index + 1);
  32.     }
  33.     else
  34.     {
  35.         printf("The entered word is not a palindrome\n");
  36.     }
  37. }}


$ gcc palindrome.c -o palindrome
$ a.out
Enter a word to check if it is a palindrome
malayalam
The entered word is a palindrome

Sanfoundry Global Education & Learning Series – 1000 C Programs.

Here’s the list of Best Reference Books in C Programming, Data-Structures and Algorithms

If you wish to look at other example programs on Strings, go to C Programming Examples on Strings. If you wish to look at programming examples on all topics, go to C Programming Examples.
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Manish Bhojasia, a technology veteran with 17+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer and SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage & Cluster Administration, Advanced C Programming, SAN Storage Technologies, SCSI Internals and Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him below.


Sanfoundry Training Center of Excellence (CoE)

Manish Bhojasia, a technology veteran with 17+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer and SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage & Cluster Administration, Advanced C Programming, SAN Storage Technologies, SCSI Internals and Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him below.


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