Factorial of A Number [C Programming]

#include<stdio.h>
int main()
{
    int i, n, factorial=1;
    printf("Enter an integer: ");
    scanf("%d", &n);
    if(n<0)
    {
        printf("Factorial of a negative number doesn't exist!");
    }
    else
    {
        for(i=1; i<=n; i++)
        {
            factorial *= i;
        }
        printf("Factorial of %d is: %d", n, factorial);
    }
    return 0;
}