C program to reverse given number

//reversing a number 
#include<stdio.h>
#include<conio.h>
int main()
{
    int sum=0,n;
    printf("enter a number to reverse : ");
    scanf("%d",&n);
    while(n)
    {
            sum=sum*10+n%10;
            n=n/10;
    }
    printf("%d",sum);
_getch();
return 0;
}


i/p : 1234
o/p : 4321