Write a program to check String is Palindrome without using loop?

C program to Check String is Palindrome without using a loop is as follows:

/*
 * C program to find the length of a string without using the
 * built-in function also check whether it is a palindrome
 */
#include <stdio.h>
#include <conio.h>
 
void main()
{
    char string[25], reverse_string[25] = {'\0'};
    int i, length = 0, flag = 0;
 
    printf("Enter a string: ");
    gets(string);
    /*  keep going through each character of the string till its end */
    for (i = 0; string[i] != '\0'; i++)
    {
        length++;
    }
    printf("The length of the string '%s' = %d\n", string, length);
    for (i = length - 1; i >= 0 ; i--)
    {
        reverse_string[length - i - 1] = string[i];
    }
   /*  Check if the string is a Palindrome */
 
    for (flag = 1, i = 0; i < length ; i++)
    {
        if (reverse_string[i] != string[i])
            flag = 0;
    }
    if (flag == 1)
       printf ("%s is a palindrome \n", string);
    else
       printf("%s is not a palindrome \n", string);
}

Output:
Enter a string: how  are you
The length of the string 'how  are you' = 12
how  are you is not a palindrome
 
Enter a string: madam
The length of the string 'madam' = 5
madam is a palindrome
 
Enter a string: mam
The length of the string 'mam' = 3
mam is a palindrome