palindrome in c using function

1#include <stdio.h>
2#include <conio.h>
3
4void main()
5{
6
7    int n,i,r=0;
8    
9    printf("Enter a number: ");
10    scanf("%d",&n);
11    
12    for(i=n;i!=0;i)
13    {
14        r=r*10;
15        r=r+ i%10;
16        i=i/10;
17    }
18    
19    if(r==n)
20        printf("palindrome");
21    else
22        printf("Not palindrome");
23}

1#include <stdio.h>
2int main() {
3    int n, reversedN = 0, remainder, originalN;
4    printf("Enter an integer: ");
5    scanf("%d", &n);
6    originalN = n;
7
8    // reversed integer is stored in reversedN
9    while (n != 0) {
10        remainder = n % 10;
11        reversedN = reversedN * 10 + remainder;
12        n /= 10;
13    }
14
15    // palindrome if orignalN and reversedN are equal
16    if (originalN == reversedN)
17        printf("%d is a palindrome.", originalN);
18    else
19        printf("%d is not a palindrome.", originalN);
20
21    return 0;
22}
23
24

1#include <stdio.h>
2#include <conio.h>
3
4int palindrome (int num);
5
6void main()
7{
8    int n, ret;
9    printf("Enter the number: ");
10    scanf("%d",&n);
11
12    ret = palindrome(n);
13
14    if (ret == n)
15        printf("\nPalindrome\n");
16    else
17        printf("\nNot Palindrome\n");
18}
19
20int palindrome(int num)
21{
22    int rem, rev=0;
23
24    while (num!=0)
25    {
26        rem = num % 10;
27        rev = rev * 10 + rem;
28        num /= 10;
29    }
30
31    return rev;
32}
33