Write a program to find the reverse of given number or "n" number.

#include<stdio.h>
#include<conio.h>
void main()
{
 int n,r,rev=0;
 printf("Enter a number");
 scanf("%d",n);
 while(n!=0)
   {
    r=n%10;
    rev=rev*10+r;
    n=n/10;
   }
 printf("\n Reverse Number = %d",rev);
}

Write a program to check the given number is palindrome or not.

#include<stdio.h>
#include<conio.h>
void main()
{
int n,sum=0,temp,d;
printf("\n Enter a number ");
scanf("%d",&n);
temp=n;
while(n!=0)
{
d=n%10;
sum=sum*10+d;
n=n/10;
}
if(temp==sum)
 printf("\n Palindrome");
else
 printf("\n Not Palindrome");
}

Write a program to calculate factorial using recursive function.

#include<stdio.h>
#include<conio.h>
 int fact(int n)
 void main()
{
   int n,f;
   printf("enter a number ");
   scanf("%d",n);
   f=fact(n);
   printf("\n Factorial of %d is %d",n,f");
}
  int fact(int n)
{
   if (n<=1)
   return(1);
   else
   return(n*fact(n-1));
}