Positive or negative or zero using function

#include<stdio.h>
void checkNum(n)
{
    if(n>0)
    {
        printf("Positive.");
    }

    else if(n<0)
    {
        printf("Negative.");

    }

    else
    {
        printf("Zero.");
    }

}
int main()
{
    int n;
    scanf("%d", &n);
    checkNum(n);
    return 0;
}