Develop a C program to check whether the given string is palindrome or not

Code

using string functions

#include <stdio.h>
#include <string.h>
  
int main()
{
   char inputArray[100], reversedArray[100];
 
   printf("Enter the string for palindrome check \n");
   scanf("%s", inputArray);
   /* Copy input string and reverse it*/
   strcpy(reversedArray, inputArray);
   /* reverse string */
   strrev(reversedArray);
   /* Compare reversed string with inpit string */
   if(strcmp(inputArray, reversedArray) == 0 )
      printf("%s is a palindrome.\n", inputArray);
   else
      printf("%s is not a palindrome.\n", inputArray);
       
   return 0;
}


without using string functions

#include <stdio.h>
#include <string.h>
 
int main(){
    char inputString[100];
    int leftIndex, rightIndex, length = 0;
    printf("Enter a string for palindrome check\n");
    scanf("%s", inputString);
    /* Find length of input string */
    while(inputString[length] != '\0')
        length++;
    /* If length of string is less than 1, ERROR */
    if(length < 1) 
        return 1;
         
    /* Initialize leftIndex and rightIndex to first and 
     last character of input string */
    leftIndex = 0;
    rightIndex = length -1;
    /* Compare left and right characters, If equal then 
     continue otherwise not a palindrome */
    while(leftIndex < rightIndex){
        if(inputString[leftIndex] != inputString[rightIndex]){
            printf("%s is not a Palindrome \n", inputString);
            return 0;
        }
        leftIndex++;
        rightIndex--;
    }
    printf("%s is a Palindrome \n", inputString);
    return 0;
}

Output