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

By | 29.11.2016

C Program to Check String is Palindrome or not


Write a C Program to Check whether String is Palindrome or not using Recursion. Here’s simple Program to Check whether String is Palindrome or not using Recursion in C Programming Language.


Recursion : :


  • Recursion is the process of repeating items in a self-similar way. In programming languages, if a program allows you to call a function inside the same function, then it is called a recursive call of the function.
  • The C programming language supports recursion, i.e., a function to call itself. But while using recursion, programmers need to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.
  • Recursive functions are very useful to solve many mathematical problems, such as calculating the factorial of a number, generating Fibonacci series, etc.

Problem : :


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.

Below is the source code for C Program to Check whether String is Palindrome or not using Recursion which is successfully compiled and run on Windows System to produce desired output as shown below :


SOURCE CODE : :


/* C Program to Check whether String is Palindrome or not using Recursion */


#include <stdio.h>
#include <string.h>
 
void check(char [], int);
 
int main()
{
    char word[15];
 
    printf("Enter a word to check if it is a palindrome\n");
    scanf("%s", word);
    check(word, 0);
 
    return 0;
}
 
void check(char word[], int index)
{
    int len = strlen(word) - (index + 1);
    if (word[index] == word[len])
    {
        if (index + 1 == len || index == len)
        {
            printf("The entered word is a palindrome\n");
            return;
        }
        check(word, index + 1);
    }
    else
    {
        printf("The entered word is not a palindrome\n");
    }
}

Output :


***************** OUTPUT ********************


***************** FIRST RUN *****************

Enter a word to check if it is a palindrome 
CodezClub

The entered word is not a palindrome

***************** SECOND RUN *****************

Enter a word to check if it is a palindrome
radar

The entered word is a palindrome

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About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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