Program to print product of digit using while loop in C-language

#include<stdio.h>
int main()
{
    int n,a,p=1;
    printf("Enter the number\n");
    scanf("%d",&n);
    while(n!=0)
    {
        a=n%10;
        n=n/10; 
    p=p*a;
    }
    printf("Product of digit=%d",p);
}

OUTPUT
Enter the number
1234
Product of digit=24