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Palindrome of a given number using C

#include<stdio.h>
#include<conio.h>

void main()
{
   long n, r, ri=0, oi;

   clrscr();
   printf("\nEnter a number: ");
   scanf("%ld",&n);

   oi = n;
   while(oi!=0)
   {
      ri = ri * 10;
      ri = ri + oi % 10;
      oi = oi / 10;
   }
   if(n==ri)
   {
      printf("\nThe given number is a Palindrome");
   }
   else
   {
      printf("\nThe given number is not a palindrome");
   }
   getch();
}

Output:

Enter a number: 1221
The given number is a Palindrome


Output:

Enter a number: 953212359
The given number is a Palindrome
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